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Journal of Fish Biology

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https://www.readbyqxmd.com/read/28211057/reproductive-energy-expenditure-and-changes-in-body-morphology-for-a-population-of-chinook-salmon-oncorhynchus-tshawytscha-with-a-long-distance-migration
#1
T E Bowerman, A Pinson-Dumm, C A Peery, C C Caudill
Energetic demands of a long freshwater migration, extended holding period, gamete development and spawning were evaluated for a population of stream-type Chinook salmon Oncorhynchus tshawytscha. Female and male somatic mass decreased by 24 and 21%, respectively, during migration and by an additional 18 and 12% during holding. Between freshwater entry and death after spawning, females allocated 14% of initial somatic energy towards gonad development and 78% for metabolism (46, 25 and 7% during migration, holding and spawning, respectively)...
February 16, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28211053/q10-measures-of-metabolic-performance-and-critical-swimming-speed-in-king-george-whiting-sillaginodes-punctatus
#2
N Mazloumi, J L Johansen, Z A Doubleday, B M Gillanders
This study examined thermally driven changes in swimming performance and aerobic metabolism (Q10 and aerobic scope of activity) of adult King George whiting Sillaginodes punctatus to the coldest (16° C) and the warmest (26° C) temperature encountered by this species. Compensation of aerobic scope, higher maximal swimming speeds and a maintained capacity to repay oxygen debt indicate that this species is capable of thermal acclimation to conditions expected under global warming.
February 16, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28194765/schindleria-elongata-a-new-species-of-paedomorphic-gobioid-from-the-red-sea-teleostei-schindleriidae
#3
R Fricke, M Abu El-Regal
A new species of paedomorphic gobioid, Schindleria elongata, from the Red Sea, is described on the basis of five specimens. The new species is characterized by its lack of body pigmentation; the body depth at pectoral-fin origin 4-5% of standard length (LS ) and at anal-fin origin 5-7% LS ; the predorsal length 66-70% LS ; pre-anal length 66-71% LS ; dorsal-fin rays 13 or 14; anal-fin rays 10 or 11; first dorsal-fin ray at myomere 20 or 21; first anal-fin ray below second to fourth dorsal-fin rays; myomeres 19 or 20 + 13 or 14 = 33 or 34 total; premaxillae and dentaries with small teeth; gas bladder located posteriorly at 56-60% LS ; males with a rod-like, flexible urogenital papilla lacking lobes, projections or accessory papillae, with distal half tapering to a broad, angular point and usually posteriorly directed...
February 14, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28181255/taxonomic-revision-of-the-south-american-catfish-genus-ageneiosus-siluriformes-auchenipteridae-with-the-description-of-four-new-species
#4
F R V Ribeiro, L H Rapp Py-Daniel, S J Walsh
The catfish genus Ageneiosus in the exclusively Neotropical family Auchenipteridae is revised. Species of Ageneiosus are widely distributed in all major South American continental drainages except the São Francisco River basin and small rivers along the Brazilian east coast. The taxonomic revision was based on examination of available type specimens, additional museum material and comparisons of original descriptions. A suite of morphometric, meristic and qualitative characters of internal and external anatomy were used to diagnose valid species and determine synonyms...
February 9, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28181239/reproduction-of-the-duck-catfish-ageneiosus-ucayalensis-in-a-ria-river-system
#5
V A Oliveira, M A P Ferreira, R M Rocha, L F A Montag
A total of 1006 duck catfish Ageneiosus ucayalensis were collected from a ria river system of eastern Amazonia, of which 733 were females and 273 males, a sex ratio 2·69:1. Condition factors of males were higher than those of females and size at first sexual maturity (L50 ) was 12·8 cm for females and 11·8 cm for males. The relative frequency of mature specimens and gonad condition indices indicate that the breeding season is short and coincides with the rainy season.
February 8, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28164280/interdecadal-changes-in-the-community-population-and-individual-levels-of-the-fish-fauna-of-an-extensively-modified-estuary
#6
F J Valesini, A Cottingham, C S Hallett, K R Clarke
This study examined inter-period changes over two to three decades in the fish fauna of an urbanized estuary experiencing rapid population growth and a drying climate (Swan-Canning Estuary, Western Australia). Responses were compared at the fish community level (species composition; 1978-2009 in the shallows and 1993-2009 in deeper waters) and at the population and individual levels of an estuarine indicator species, black bream Acanthopagrus butcheri (biomass-abundance and per capita mass at age, respectively; 1993-2009)...
February 6, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28164276/behaviour-of-growth-hormone-transgenic-coho-salmon-oncorhynchus-kisutch-in-marine-mesocosms-assessed-by-acoustic-tag-telemetry
#7
T Hollo, B M Watson, S V Johnston, R H Devlin
Underwater acoustic tag telemetry was used to assess behavioural differences between juvenile wild-type (i.e. non-transgenic, NT) and growth hormone (GH) transgenic (T) coho salmon Oncorhynchus kisutch in a contained simulated ocean environment. T O. kisutch were found across days to maintain higher baseline swimming speeds than NT O. kisutch and differences in response to feeding were detected between T and NT genotypes. This is the first study to assess behaviour of GH transgenic salmonids in a marine environment and has relevance for assessing whether behavioural effects of GH overexpression seen in freshwater environments can be extrapolated to oceanic phases of the life cycle...
February 5, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28155227/a-new-cave-dwelling-loach-triplophysa-xichouensis-sp-nov-teleostei-nemacheilidae-from-yunnan-china
#8
S W Liu, X F Pan, J X Yang, X Y Chen
A new cave-dwelling loach of the genus Triplophysa, T. xichouensis, is described from an outlet of a subterranean river in Xisa Town, Xichou County, Yunnan Province, China. It can be distinguished from its congeners by the following characters: dorsal-fin rays iii, 8; anal-fin rays ii, 6; pectoral-fin rays i, 9 or 10; pelvic-fin rays i, 5 or 6; branched caudal-fin rays 16(8+8); eyes highly degenerated to a very tiny black dot; dorsal-fin origin closer to snout tip than to caudal-fin base and anterior to vertical line of pelvic-fin origin; pectoral fin length about two-thirds the distance between pectoral-fin origin to pelvic-fin origin; caudal peduncle slender, its length about three times its depth; caudal fin emarginate; body smooth and scaleless; lateral line complete and straight; anterior chamber of air bladder wrapped in dumbbell-shaped bony capsule and the posterior one well developed, long, oval; intestine short, bending in zigzag shape behind stomach...
February 2, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28144938/immunocytochemical-identification-and-ontogeny-of-adenohypophyseal-cells-in-a-cave-fish-phreatichthys-andruzzii-cypriniformes-cyprinidae
#9
G Grandi, M Pezzi, M G Marchetti, M Chicca
The morphogenesis of the pituitary gland and the chronological appearance of adenohypophyseal cells were investigated for the first time in the Somalian cave fish Phreatichthys andruzzii by immunocytochemistry. The adult adenohypophysis contained: a rostral pars distalis, with prolactin (PRL) cells arranged in follicles and adrenocorticotropic (ACTH) cells, a proximal pars distalis with somatotropic (GH), β-thyrotropic (TSH), β-gonadotropic type I (FSH) and type II (LH) cells and a pars intermedia with α-somatolactin (SL), α-melanotropic (MSH) and β-endorphin (END) cells...
February 1, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28138987/spatial-distribution-and-seasonality-of-ichthyoplankton-and-anthropogenic-debris-in-a-river-delta-in-the-caribbean-sea
#10
T Correa-Herrera, M Barletta, A R A Lima, L F Jiménez-Segura, L B Arango-Sánchez
Temporal changes in larval fish species composition and abundance compared with other components of the seston are described in four estuarine habitats in the Atrato Delta, Colombia. In comparison with zooplankton, fish larvae and egg density and anthropogenic debris abundance were low in the South Atrato Delta. Transparency, water temperature and chlorophyll a were the major factors influencing the spatiotemporal distribution of ichthyoplankton in the delta. The most abundant fish larvae were Astyanax sp. 1, Anchovia clupeoides, Cetengraulis edentulus, Anchoa sp...
January 31, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28138961/el-ni%C3%A3-o-episodes-coincide-with-california-moray-gymnothorax-mordax-settlement-around-santa-catalina-island-california
#11
B A Higgins, D Pearson, R S Mehta
The hypothesis that El Niño events influence the settlement patterns of the California moray Gymnothorax mordax is tested. The pelagic larval duration (PLD) of larval G. mordax is unknown, but studies on leptocephalus of related species suggest that larvae are long-lived, up to 2 years. Gymnothorax mordax, an elusive predatory species and the only muraenid off the coast of California, is considered abundant in the waters around Catalina Island. Thirty-three individuals were collected from Two Harbors, Catalina Island, and otoliths were taken to provide estimates of their age...
January 31, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28128454/are-antipredator-behaviours-of-hatchery-salmo-salar-juveniles-similar-to-wild-juveniles
#12
A G V Salvanes
This study explores how antipredator behaviour of juvenile Atlantic salmon Salmo salar developed during conventional hatchery rearing of eggs from wild brood stock, compared with the behaviour of wild-caught juveniles from the same population. Juveniles aged 1+ years were tested in two unfamiliar environments; in one S. salar were presented with simulated predator attacks and in the other they were given the opportunity to explore an open-field arena. No difference was found in their spontaneous escape responses or ventilation rate (reflex responses) after simulated predator attacks...
January 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28111744/passive-acoustic-monitoring-development-of-disturbance-calls-and-differentiation-of-disturbance-and-advertisement-calls-in-the-argentine-croaker-umbrina-canosai-sciaenidae
#13
J S Tellechea, M L Fine, W Norbis
Disturbance and advertisement calls of the Argentine croaker Umbrina canosai were recorded from coastal Uruguayan waters. Dissections indicate typical sciaenid extrinsic swimbladder muscles present exclusively in males. Disturbance calls were produced when captive U. canosai were startled, chased with a net or grabbed by the tail. Calls were unusual for sciaenids because each pulse consisted of multiple cycles. The number of cycles per pulse and dominant frequency did not change with U. canosai size, but pulse duration and interpulse interval increased...
January 23, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28105739/validation-of-daily-increment-deposition-and-early-growth-of-mud-carp-cirrhinus-molitorella
#14
Y Huang, F Chen, W Tang, Z Lai, X Li
In this study, laboratory reared Cirrhinus molitorella from hatching through to the juvenile stage were used to validate daily increment deposition. Lapilli were suitable for ageing C. molitorella. The slope of the linear relationships between increment counts and age was not significantly different from 1 (n = 258, P > 0·05), indicating that growth increments are deposited daily. The first increment following the first-feeding check formed 3 days post hatch (dph). One hundred and twenty-three juveniles, ranging from 36·4 to 84·7 mm in body length (LB ), were collected in the Pear River estuary from July to January in both 2014 and 2015 and used to estimate growth rate...
January 20, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28105677/lesser-devil-rays-mobula-cf-hypostoma-from-venezuela-are-almost-twice-their-previously-reported-maximum-size-and-may-be-a-new-sub-species
#15
N R Ehemann, L V González-González, A W Trites
Three rays opportunistically obtained near Margarita Island, Venezuela, were identified as lesser devil rays Mobula cf. hypostoma, but their disc widths were between 207 and 230 cm, which is almost double the reported maximum disc width of 120 cm for this species. These morphometric data suggest that lesser devil rays are either larger than previously recognized or that these specimens belong to an unknown sub-species of Mobula in the Caribbean Sea. Better data are needed to describe the distribution, phenotypic variation and population structure of this poorly known species...
January 20, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28105658/first-confirmed-record-of-mola-sp-a-in-the-western-mediterranean-sea-morphological-molecular-and-parasitological-findings
#16
A E Ahuir-Baraja, Y Yamanoue, L Kubicek
Recent molecular and morphological studies suggest the existence of at least three species of Mola (Mola spp. A, B and C). Currently, only Mola mola and Mola ramsayi are formally accepted and species A, B or C have not been assigned to these thus far. In this study, a large ocean sunfish in the western Mediterranean Sea was analysed molecularly and morphologically, identified as Mola sp. A and a detailed account of the specimen's parasite load is reported.
January 19, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28101957/summer-co-existence-of-small-sized-cyprinid-and-percid-individuals-in-natural-and-impounded-stretches-of-a-lowland-river-food-niche-partitioning-among-fishes
#17
J Lik, M Dukowska, M Grzybkowska, J Leszczyńska
Due to changes of discharge regime downstream of a dam reservoir, an alluvial natural stretch of the Warta River changed to a macrophyte-dominated ecosystem. Large patches of submersed, aquatic macrophytes appeared in summer and their effect is analysed in this study. These patches contained enriched macroinvertebrate assemblages (epiphyton and benthos) and they were refuge for both zooplankton and young fishes released from the reservoir. Despite these altered conditions in this stretch, roach Rutilus rutilus, perch Perca fluviatilis and ruffe Gymnocephalus cernua dominated, as they did in the natural backwater...
January 18, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28101948/influence-of-the-marine-feeding-area-on-the-muscle-and-egg-fatty-acid-composition-of-atlantic-salmon-salmo-salar-spawners-estimated-from-the-scale-stable-isotopes
#18
J Torniainen, M J Kainz, R I Jones, M Keinänen, P J Vuorinen, M Kiljunen
Fatty acids in muscle tissue and eggs of female Atlantic salmon Salmo salar spawners were analysed to evaluate the dietary quality of their final feeding areas in the Baltic Sea. The final likely feeding area was identified by comparing stable carbon and nitrogen isotope composition of the outermost growth region (final annulus) of scales of returned S. salar with that of reference S. salar caught from different feeding areas. Some overlap of stable-isotope reference values among the three areas, in addition to prespawning fasting, decreased the ability of muscle tri-acylglycerols to discriminate the final likely feeding area and the area's dietary quality...
January 18, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28097664/testing-mate-choice-and-overdominance-at-mh-in-natural-families-of-atlantic-salmon-salmo-salar
#19
C Tentelier, O Barroso-Gomila, O Lepais, A Manicki, I Romero-Garmendia, B M Jugo
This study aimed to test mate choice and selection during early life stages on major histocompatibility (MH) genotype in natural families of Atlantic salmon Salmo salar spawners and juveniles, using nine microsatellites to reconstruct families, one microsatellite linked to an MH class I gene and one minisatellite linked to an MH class II gene. MH-based mate choice was only detected for the class I locus on the first year, with lower expected heterozygosity in the offspring of actually mated pairs than predicted under random mating...
January 18, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28097663/the-evolution-of-male-nuptial-colour-in-a-sexually-dimorphic-group-of-fishes-percidae-etheostomatinae
#20
P J Ciccotto, T C Mendelson
To test hypotheses explaining variation in elaborate male colouration across closely related species groups, ancestral-state reconstructions and tests of phylogenetic signal and correlated evolution were used to examine the evolution of male body and fin colouration in a group of sexually dichromatic stream fishes known as darters (Percidae: Etheostomatinae). The presence or absence of red-orange and blue-green male colour traits were scored across six body regions in 99 darter species using a recently estimated amplified fragment length polymorphism (AFLP) phylogeny for comparative analyses...
January 18, 2017: Journal of Fish Biology
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