Results 91 to 100 of about 3,908 (258)

Modified fin morphology in mackerel icefish (Champsocephalus gunnari) may indicate nesting behaviour

Journal of Fish Biology, EarlyView.
Abstract Monitoring reproductive traits in Southern Ocean species is challenging. Males in some channichthyids thicken the epithelium along their anal fins to aid nest construction. This study presents initial evidence that the only commercially harvested channichthyid, mackerel icefish (Champsocephalus gunnari), exhibits modifications to their anal ...
Huw W. James, Fabrice Stephenson, Martin A. Collins, Simeon L. Hill, William D. K. Reid   +4 more
wiley   +1 more source

Tooth morphology of deep‐water catsharks of the genus Apristurus (Chondrichthyes: Pentanchidae) in the North Atlantic Ocean

Journal of Fish Biology, EarlyView.
Abstract The deep‐water catshark family (Pentanchidae) is the most species‐rich family among extant shark lineages. Within this family, the genus Apristurus is the largest, comprising small, deep‐sea species characterised by elongated bodies and dorso‐ventrally compressed snouts. Five Apristurus species are currently recognised from the North Atlantic,
Jesco Seifert, Daniel M. Moore
wiley   +1 more source

Atmospheric CO2 emissions and ocean acidification from bottom-trawling

Frontiers in Marine Science
Trawling the seafloor can disturb carbon that took millennia to accumulate, but the fate of that carbon and its impact on climate and ecosystems remains unknown.
Trisha B. Atwood, Anastasia Romanou, Anastasia Romanou, Tim DeVries, Paul E. Lerner, Paul E. Lerner, Juan S. Mayorga, Juan S. Mayorga, Darcy Bradley, Darcy Bradley, Reniel B. Cabral, Gavin A. Schmidt, Enric Sala   +12 more
doaj   +1 more source

Early‐life temperature drives recruitment success in Eurasian perch (Perca fluviatilis) populations

Journal of Fish Biology, EarlyView.
Abstract Interannual fluctuations in the abundance of young‐of‐the‐year (YOY) European perch (Perca fluviatilis) were studied in two large French peri‐alpine lakes using a 12‐year dataset of late summer hydroacoustic surveys. Previous research has highlighted the importance of temperature.
Valentin Cavoy, Jean Guillard, Cécilia Barouillet, Orlane Anneville, Najwa Sharaf, Christian Gillet, Chloé Goulon   +6 more
wiley   +1 more source

Performance of pulse trawling compared to conventional beam trawling

, 2006
A series of nine fishing trips with on board observers were carried out on MFV UK153 (PT1) and two beam trawlers (BT1, BT2) of comparative engine power and size to appraise the performance of pulse beam v.s. conventional tickler chain beam trawls. The main conclusions from this study are: 1.
van Marlen, B., Grift, R.E., van Keeken, O.A., Ybema, M.S., van Hal, R.   +4 more
openaire   +1 more source

Quantifying post‐release behaviour of a critically endangered elasmobranch over two capture events using high‐resolution archival tag data

Journal of Fish Biology, EarlyView.
Abstract During catch‐and‐release angling, highly resident species are susceptible to multiple recapture events. Biologging offers the opportunity to study post‐release behaviour in detail; however, most studies have focused on a single capture‐release event.
Danielle L. Orrell, Jamie Darby, Damien Haberlin, Alfonso Cohuo, Luke Harman, Thomas K. Doyle   +5 more
wiley   +1 more source

Size‐, sex‐ and site‐dependent morphological variation in the stone flounder (Kareius bicoloratus) from Korean coastal waters

Journal of Fish Biology, EarlyView.
Abstract Kareius bicoloratus is a commercially important flatfish in Korean coastal fisheries and an ecologically relevant benthic species in nearshore ecosystems. To evaluate how multiple biological and environmental factors jointly shape flatfish morphology, we analysed 81 morphometric indices and two‐dimensional geometric morphometrics (GMM) in wild
Eun Jeong Kim, Songhyun Gwon, Ju Hwan Park, In Chul Bang, Yoon Kwon Nam   +4 more
wiley   +1 more source

Trawl-kite

, 2023
Denne bacheloroppgaven utforsker designprosessen for et trål-kitesystem, en spennende fremgang innen marinteknologi. Trål-kite er konseptualisert som et autonomt system med mål om å gjøre bunntråling, en betydelig del av de globale fiskeriene, mer bærekraftig. Dette innovative systemet er utformet som en kite, utstyrt med hydrofoiler for løftgenerering,
openaire   +1 more source

Egg and larval production of Eastern Baltic cod in captivity over one spawning season

Journal of Fish Biology, EarlyView.
Abstract Eastern Baltic cod (Gadus morhua) has experienced a dramatic decline in biomass, distribution, size and condition over recent decades, related to a combination of fishing pressure and environmental stressors. Reduced parental size and condition are known to impact reproductive success, affecting egg quality, fertilization and hatching success ...
Neele Schmidt, Marc M. Hauber, Samuel Hylander, Anssi Laurila, Felix Mittermayer, Jan Dierking   +5 more
wiley   +1 more source

DNA barcoding reveals the presence of Whitson's grenadier, Macrourus whitsoni, in sub‐Antarctic waters of South Georgia, Southern Ocean

Journal of Fish Biology, EarlyView.
Abstract Macrourid species constitute the main bycatch in Southern Ocean toothfish longline fisheries. We report the first confirmed record of Whitson's grenadier, Macrourus whitsoni, in the South Georgia toothfish fishery. Mitochondrial cox1 DNA barcoding confirmed its presence in bycatch samples collected around South Georgia and the northern South ...
M. L. Romero Martínez, J. Abreu, J. P. Queirós, J. C. Xavier, P. R. Hollyman, E. Fitzcharles, M. A. Collins   +6 more
wiley   +1 more source