Results 121 to 130 of about 38,262 (209)
First Observations of Potential Iteroparity in Pacific Capelin Mallotus catervarius
ABSTRACT Using histology to examine ovarian structures in Pacific capelin for the first time, we found biological evidence that captive, age‐1, female Pacific capelin Mallotus catervarius are capable of iteroparity (41% of mature females). Evidence of the potential to spawn over multiple years included more than one oocyte cohort, including primary ...
C. Rodgveller, F. Sewall
wiley +1 more source
Modelling diet composition dynamics among North Sea predatory fish using a length-structured partial ecosystem model [PDF]
Multispecies fisheries management approaches must take account of the array of trophic interactions within the ecosystem. Studies of the gut contents of fish stocks in the North Sea show decadal changes in diet composition, as might be expected when the ...
Heath, Michael +2 more
core
ABSTRACT Assessing genetic structure across ocean basins is essential to understand connectivity and guide conservation in data‐deficient open‐water sharks. In this study, we examined the population genomics of Squalus cf. mitsukurii by analyzing tissue samples collected from two distant regions: California, USA (Pacific Ocean) and Pernambuco, Brazil ...
Aisni Mayumi Corrêa de Lima Adachi +11 more
wiley +1 more source
Demersal fishery resources of India – an update- Winter School on Towards Ecosystem Based Management of Marine Fisheries – Building Mass Balance Trophic and Simulation Models [PDF]
The continental shelf of Indian EEZ extending upto 200 m depth is a rich abode of a variety of demersal finfish resources contributing substantially to the total marine fish production in the country.
Sivakami, S
core
The absolute and relative volume of major sensory and integrative brain regions of the southern bluefin tuna Thunnus maccoyii are examined using magnetic resonance imaging (MRI). A dominant cerebellum projects into the midbrain ventricular space, while the optic tectum represents a smaller proportion of total brain volume than previously estimated ...
Myoung Hoon Ha +9 more
wiley +1 more source
Genetic Structure of Blue Ling, Molva dypterygia, in the North Atlantic
The blue ling, a deep‐water fish in the Northeast Atlantic, has experienced severe population declines since the 1970s due to intensive fishing. Genetic analysis across fjords and offshore regions using 61 SNPs revealed weak but significant differentiation, rejecting the idea of a single randomly mating population.
María Quintela +6 more
wiley +1 more source
The Unseen Crisis of Sharks and Rays in Senegal
This study presents a conservative quantitative assessment of shark and ray landings and trade in Senegal, revealing extensive exploitation of threatened species. Surveys at two major artisanal processing sites in the Casamance region recorded over 170,000 individuals, mostly rays, with nearly all biomass comprising species at risk of extinction, and ...
Rima W. Jabado +3 more
wiley +1 more source
Status and management of the Java sea fisheries [PDF]
The Java Sea is a major fishing ground in Indonesia contributing 31% of the national marine fisheries production. Demersal and small pelagic fishery resources account for most production in the area.
Purwanto
core
Analysis of Demersal Fish Schooling Distribution in Tarakan Waters North Borneo by Using Hidroacoustic Method [PDF]
This research is aimed to determine the distribution of demersal fish schooling and the relation between demersal fish schooling and temperature, salinity and depth of water by using hydroacoustic method.
Mubarak, M. (Mubarak) +2 more
core
Male Agonistic Behavior on Atlantic Cod Spawning Grounds
The mating system of the Atlantic cod (Gadus morhua) has been described as a lek, a mating system where male–male aggressions are expected. However, observing aggressions directly in marine environments is challenging. Using accelerometer tags we show that male–male agonistic interactions, inferred from activity levels, are indeed present on natural ...
J. E. Skjæraasen +11 more
wiley +1 more source

