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Journal of Fish Biology

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https://www.readbyqxmd.com/read/28321878/reproductive-biology-of-haemulon-plumierii-in-the-south-western-atlantic-ocean-s-most-extensive-reefs-implications-for-fisheries-management
#1
G C S Hoffmann, M O Freitas, R L Moura, M Previero, V Abilhoa
The reproductive biology of the white grunt Haemulon plumierii was studied from 360 individuals obtained from artisanal fisheries landings in the Abrolhos Bank, Brazil, between August 2010 and March 2012. The overall sex-ratio did not differ significantly from 1:1, although males predominated in larger size classes. β-Binomial modelling of historical sex-ratio data indicated that the catch rate of females has increased in recent years. Females reached maturity at a smaller total length (LT ; 214 mm) than males (235 mm LT ) and the LT at which 50% of all individuals are mature (L50 ) was 220 mm, corresponding to 41·5% of the maximum recorded LT ...
March 21, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28321875/zygoparity-and-sex-steroid-hormone-profiles-in-bluemouth-helicolenus-dactylopterus
#2
V Sequeira, E Couto, A Neves, A R Vieira, R B Paiva, A V M Canario, L S Gordo
Two hundred and seven individuals (103 females and 104 males) of bluemouth Helicolenus dactylopterus (Scorpaeniformes, Sebastidae), a commercially important deep-water species with an unusual reproductive strategy, from the eastern Atlantic Ocean ranging from 13·9 to 37·5 cm total length (LT ) were analysed from September 2011 to October 2012. The analysis included gonad maturity phases and blood-plasma levels of oestradiol-17β (E2 ), 11-ketotestosterone (11-KT) and 17,20β-dihydroxypregn-4-en-3-one (17,20β-P)...
March 21, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28321848/population-genetic-structure-and-comparative-diversity-of-smallmouth-bass-micropterus-dolomieu-congruent-patterns-from-two-genomes
#3
C A Stepien, S I Karsiotis, T J Sullivan, K E Klymus
Genetic diversity and divergence patterns of smallmouth bass Micropterus dolomieu spawning groups are analysed across its northern native range with mtDNA cytochrome b gene sequences and eight unlinked nuclear DNA microsatellite loci. Results reveal high levels of genetic variability and significant differences in allelic representation among populations (mtDNA: mean ± s.e., HD  = 0·50 ± 0·06, mean ± s.e., θST  = 0·41 ± 0·02 and microsatellites: mean ± s.e. HO  = 0·46 ± 0·03, mean ± s...
March 21, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28317121/divergence-in-physiological-factors-affecting-swimming-performance-between-anadromous-and-resident-populations-of-brook-charr-salvelinus-fontinalis
#4
A Crespel, A Dupont-Prinet, L Bernatchez, G Claireaux, R Tremblay, C Audet
In this study, an anadromous strain (L) and a freshwater-resident (R) strain of brook charr Salvelinus fontinalis as well as their reciprocal hybrids, were reared in a common environment and submitted to swimming tests combined with salinity challenges. The critical swimming speeds (Ucrit ) of the different crosses were measured in both fresh (FW) and salt water (SW) and the variations in several physiological traits (osmotic, energetic and metabolic capacities) that are predicted to influence swimming performance were documented...
March 19, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28303565/morphometry-and-microanatomy-of-the-barbels-of-the-common-sawshark-pristiophorus-cirratus-pristiophoridae-implications-for-pristiophorid-behaviour
#5
R J Nevatte, J E Williamson, N G F Vella, V Raoult, B E Wueringer
The internal anatomy of the barbels of the common sawshark Pristiophorus cirratus was examined with light microscopy to clarify their sensory role. No sensory structures such as taste buds (chemoreception), ampullae of Lorenzini (electroreception) or free neuromasts (lateral line mechanoreception) could be located in the barbels. The presence of bundles of nerve fibres, however, indicates a tactile function for the barbels. Conveyance of information regarding potentially damaging stimuli (nociception) and temperature (thermoception) cannot be excluded at this stage...
March 17, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28299778/the-short-lived-neon-damsel-pomacentrus-coelestis-implications-for-population-dynamics
#6
M J Kingsford, M D O'Callaghan, L Liggins, G Gerlach
Daily increments of Pomacentrus coelestis, an abundant and well-studied fish, were validated for the life of the fish and depending on the location, age-maxima were estimated to be 127-160 days on reefs separated by tens to hundreds of kilometres on the Great Barrier Reef. This contrasts with congeners and other damselfishes that live for 5 years or more. Otoliths of P. coelestis were thinner and had different patterns of banding when compared with relatively long-lived congeners. It is suggested that banding patterns in P...
March 16, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28295281/structure-composition-mechanics-and-growth-of-spines-of-the-dorsal-fin-of-blue-tilapia-oreochromis-aureus-and-common-carp-cyprinus-carpio
#7
N Kalish-Achrai, E Monsonego-Ornan, R Shahar
The structural, compositional and mechanical properties of the spines of the dorsal fin in mature anosteocytic blue tilapia Oreochromis aureus and osteocytic common carp Cyprinus carpio are described, as well as their temporal growth pattern and regenerative capacities. The three-dimensional architecture of both spines, from macro to sub-micron levels, is shown to be axially oriented and therefore highly anisotropic and the spines of both species are able to regenerate after partial amputation.
March 14, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28271507/establishment-and-characterization-of-a-cell-line-from-the-head-kidney-of-golden-pompano-trachinotus-ovatus-and-its-application-in-toxicology-and-virus-susceptibility
#8
P Li, L Zhou, S Wei, M Yang, S Ni, Y Yu, J Cai, Q Qin
A cell line derived from the head kidney of golden pompano Trachinotus ovatus (TOHK) was established and characterized in this study. The TOHK cells grew most rapidly at 28° C and the optimum foetal bovine serum concentration in L-15 medium was 10%. The TOHK cells have a diploid chromosome number of 2N = 54. The transfection efficiency of TOHK cells was 7·5% at the 15th passage and 72% at the 40th passage. The transfection efficiency in TOHK cells was high, so these cells are suitable for foreign gene expression...
March 8, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28266017/what-can-morphology-tell-us-about-ecology-of-four-invasive-goby-species
#9
K Jakubčinová, P Simonović, B Števove, J Čanak Atlagić, V Kováč
This study presents a detailed comparative analysis of external morphology of four of the most invasive goby species in Europe (round goby Neogobius melanostomus, bighead goby Ponticola kessleri, monkey goby Neogobius fluviatilis and racer goby Ponticola gymnotrachelus) and interprets some ecological requirements of these species based on their morphological attributes. The results are evaluated within an ontogenetic context, and the morphological differences between the species are discussed in terms of the question: can special external shape adaptations help to assess the invasive potential of each species? The morphometric analyses demonstrate important differences between the four invasive gobies...
March 7, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28266010/some-observations-on-the-biology-of-two-rarely-seen-deep-sea-chimaerids-chimaera-carophila-and-hydrolagus-homonycteris
#10
B Finucci, D W Stevens, E G Jones, M R Dunn
Chimaera carophila (n = 45) and Hydrolagus homonycteris (n = 11), two deep-sea chimaerids rarely caught in the waters off New Zealand, were collected from research trawl catches and commercial fishery catches around New Zealand at depths between 400 and 1300 m, between 2014 and 2016. Additional preserved specimens of both species (n = 58) from museum collections were analysed for size, sex and maturity. External assessment of male claspers and a combination of internal assessments of female gonad mass and oviducal gland width, were used to determine maturity...
March 7, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239877/feeding-range-of-age-1-year-eurasian-perch-perca-fluviatilis-in-the-baltic-sea
#11
I Ahlbeck Bergendahl, P B Holliland, S Hansson, O Karlöf
Using the widespread Eurasian perch Perca fluviatilis as a model organism, feeding ranges were investigated using stable-isotope ratios (δ(15) N and δ(13) C) and body condition. Differences were found between closely located sampling sites in a littoral area without obvious migration barriers, indicating that individual fish had small feeding ranges. Body condition differences between sampled stations were consistent over 4 years. Such sedentary behaviour is important to consider in, e.g. fisheries management and environmental monitoring, as local catch regulations may be meaningful or geographic stability in sampling locations may reduce noise in data...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239874/habitat-segregation-and-cryptic-adaptation-of-species-of-periophthalmus-gobioidei-gobiidae
#12
G Polgar, S Zaccara, M Babbucci, F Fonzi, C M Antognazza, N Ishak, Z Sulaiman, G Crosa
A study was conducted on the habitat distribution of four sympatric species of Periophthalmus (the silver-lined mudskipper Periophthalmus argentilineatus, the slender mudskipper Periophthalmus gracilis, the kalolo mudskipper Periophthalmus kalolo and the Malacca mudskipper Periophthalmus malaccensis) from northern Sulawesi. Molecular phylogenetic reconstructions based on one mtDNA marker (16S) were used to validate the morphological taxa, identifying five molecular clades. Periophthalmus argentilineatus includes two molecular species, which are named Periophthalmus argentilineatus clades F and K...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239865/effect-of-weight-and-frontal-area-of-external-telemetry-packages-on-the-kinematics-activity-levels-and-swimming-performance-of-small-bodied-sharks
#13
I A Bouyoucos, C D Suski, J W Mandelman, E J Brooks
This study sought to observe the effects of submerged weight and frontal cross-sectional area of external telemetry packages on the kinematics, activity levels and swimming performance of small-bodied juvenile sharks, using lemon sharks Negaprion brevirostris (60-80 cm total length, LT ) as a model species. Juveniles were observed free-swimming in a mesocosm untagged and with small and large external accelerometer packages that increased frontal cross-sectional area of the animals and their submerged weight...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28239851/sawfishes-stealth-revealed-using-computational-fluid-dynamics
#14
D R Bradney, A Davidson, S P Evans, B E Wueringer, D L Morgan, P D Clausen
Detailed computational fluid dynamics simulations for the rostrum of three species of sawfish (Pristidae) revealed that negligible turbulent flow is generated from all rostra during lateral swipe prey manipulation and swimming. These results suggest that sawfishes are effective stealth hunters that may not be detected by their teleost prey's lateral line sensory system during pursuits. Moreover, during lateral swipes, the rostra were found to induce little velocity into the surrounding fluid. Consistent with previous data of sawfish feeding behaviour, these data indicate that the rostrum is therefore unlikely to be used to stir up the bottom to uncover benthic prey...
February 27, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28233328/goosefish-lophius-americanus-fecundity-and-spawning-frequency-with-implications-for-population-reproductive-potential
#15
R S McBride, A K Johnson, E K Lindsay, H J Walsh, R A Richards
To improve knowledge of goosefish Lophius americanus' reproductive biology, females were collected during 2009-2012 from the Mid-Atlantic Bight shelf region of the U.S. east coast. Batch fecundity increased with total length (LT ), from 229 100 to 2 243 300 mature oocytes per female (LT range: 55·5-112 cm; n = 54). This estimate of fecundity at LT is lower than one derived from a sample collected during 1982-1985. Examination of whole oocyte diameters in different months indicated that L. americanus is a serial spawner, releasing more than one egg veil per spawning season, as suspected or observed for other Lophius species...
February 23, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28224631/development-and-application-of-monoclonal-antibodies-against-igm-of-black-rockfish-sebastes-schlegeli
#16
W Zhang, X Q Tang, X Z Sheng, J Xing, W B Zhan
Monoclonal antibodies (mAbs) against black rockfish Sebastes schlegeli serum immunoglobulin M (IgM) were developed, which showed a specific reaction with the heavy chain of S. schlegeli IgM in Western blotting and with surface IgM positive (sIgM(+) ) lymphocytes in indirect immunofluorescence. mAb 2A6 was employed to investigate the antibody and sIgM(+) lymphocyte responses of S. schlegeli injected with inactivated Edwardsiella tarda, by ELISA and flow cytometry. Compared with controls, the level of specific antibodies and the percentage of sIgM(+) lymphocytes both increased in the immunized fish and simultaneously reached their peaks at day 35 after immunization...
February 21, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28220489/international-survey-on-the-use-and-welfare-of-zebrafish-danio-rerio-in-research
#17
K Lidster, G D Readman, M J Prescott, S F Owen
A survey was conducted regarding zebrafish Danio rerio use for scientific research with a focus on: anaesthesia and euthanasia; housing and husbandry; breeding and production; refinement opportunities. A total of 98 survey responses were received from laboratories in 22 countries in Europe, North America, South America, Asia and Australia. There appears a clear and urgent need to identify the most humane methods of anaesthesia and euthanasia. Aversive responses to MS-222 were widely observed raising concerns about the use of this anaesthetic for D...
February 20, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28220488/optimization-of-foraging-and-diet-by-the-piscivorous-othos-dentex-serranidae
#18
B French, M E Platell, K R Clarke, I C Potter
The aim of this study was to determine the dietary characteristics and mouth morphology of Othos dentex and to use these data, together with in situ observations of feeding behaviour, to elucidate how foraging and diet are optimized by this piscivorous serranid. Seasonal spear and line fishing over reefs in south-western Australia yielded 426 O. dentex (total length, LT , 183-605 mm), among which the stomachs of 95 contained food. The food in the stomachs of 76 fish was sufficiently undigested to be seen to contain, almost invariably, a single fish prey, which was typically identifiable to family and often to species...
February 20, 2017: Journal of Fish Biology
https://www.readbyqxmd.com/read/28217894/feeding-dynamics-consumption-rates-and-daily-ration-of-wahoo-acanthocybium-solandri-in-indo-pacific-waters
#19
J N Perelman, K N Schmidt, I Haro, I R Tibbetts, M T Zischke
This study reports the diet composition of 363 wahoo Acanthocybium solandri captured from the Indo-Pacific. The study also provides the first estimates of consumption and daily ration for the species worldwide, which are important parameters for ecosystem models and may improve ecosystem-based fisheries management. Thirty-four prey taxa were identified from A. solandri stomachs with Scombridae having the highest relative importance. Actinopterygii comprised 96% of the total prey wet mass, of which 29% were epipelagic fishes, with 22% alone from Scombridae...
February 19, 2017: Journal of Fish Biology
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
#20
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
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