نتایج جستجو برای: spawning grounds

تعداد نتایج: 22006  

Journal: :Remote Sensing 2018
Dong-Hoon Yi Zheng Gong J. Michael Jech Purnima Ratilal Nicholas C. Makris

The migration of extensive social groups towards specific spawning grounds in vast and diverse ocean environments is an integral part of the regular spawning process of many oceanic fish species. Oceanic fish in such migrations typically seek locations with environmental parameters that maximize the probability of successful spawning and egg/larval survival. The 3D spatio-temporal dynamics of t...

Journal: :ICES Journal of Marine Science: Journal du Conseil 2015

2015
Ming-Yang Liu Ling-Lei Zhang Jia Li Yong Li Nan Li Ming-Qian Chen João Miguel Dias

Schizothorax prenanti is an endemic fish in the mountain rivers of southwestern China with unique protection value. To further explore the vortex motion of hydraulic habitats, which is closely related to the fish breeding process, the cross-sectional vorticity was used to evaluate the hydraulic conditions of the natural spawning habitat of S. prenanti. A coupled level-set and volume-of-fluid (C...

Journal: :Reviews in Fish Biology and Fisheries 2022

Abstract Scotland once had the largest herring fishery globally, generating local income, identity, and societal change. Following historic stock collapse, in spring 2018/2019 large shoals were observed on west coast for first time decades, at a formerly important spawning ground. This highlights urgency of maintaining (and contemporary) benthic habitat, which these fish rely upon, good conditi...

Journal: :Frontiers in Marine Science 2023

The sea bass stock around the UK (northern stock) has declined rapidly over past decade, likely due to a combination of both overfishing and low recruitment. Understanding mechanisms that drive number young reaching nursery grounds is important for explaining observed recruitment variability therefore developing effective management strategies. An individual-based model (IBM) been developed her...

Journal: :international journal of aquatic biology 0
bahram falahatkar fisheries department, faculty of natural resources, university of guilan, iran. ali safarpour amlashi departments of fisheries, faculty of marine science, tarbiat modares university, noor, iran. soheil eagderi department of fisheries, faculty of natural resources, university of tehran, iran. hamed mousavi-sabet department of fisheries sciences, faculty of natural resources, university of guilan, someh sara, guilan, iran.

alburnus chalcoides , caspian shemaya, is found in the river systems of the aral, black and caspian sea basins and is an economically valuable cyprinid from the southern caspian sea. this species has been reported as near threatened species in this basin due to damming, over and illegal fishing, destruction of its spawning grounds and water pollution. the caspian shemaya is an important species...

2017
Maude Poirier Luisa Listmann Olivia Roth

Habitat stratification by abiotic and biotic factors initiates divergence of populations and leads to ecological speciation. In contrast to fully marine waters, the Baltic Sea is stratified by a salinity gradient that strongly affects fish physiology, distribution, diversity and virulence of important marine pathogens. Animals thus face the challenge to simultaneously adapt to the concurrent sa...

Journal: : 2022

Characteristics of qualitative and quantitative composition benthos organisms on littoral spring spawning grounds Kurile Lake was given for the first time in 1974. Grounds typically consist intermiting plots pebble or gravel (clean covered by biocrust) with permanent sand component, sometime silty. The silt component rivers Srednaya Kirushutk is more impressive comparing to lake grounds. Chiron...

2000
Gudrun Marteinsdottir Asta Gudmundsdottir Vilhjalmur Thorsteinsson Gunnar Stefansson

Changes in geographical location of spawning and/or in spatial abundance of spawners may influence offspring survival. In Iceland, the spatial dynamics of spawning cod (Gadus morhua L.) are complicated due to unequal distribution of size classes on the main spawning grounds. Information on abundance, age, and size distributions during peak spawning, potential fecundity, egg size, and estimated ...

Journal: :international journal of aquatic biology 0
naser uddin sk regional centre of central marine fisheries research institute (icar), visakhapatnam-530 003, andhra pradesh, india shubhadeep ghosh regional centre of central marine fisheries research institute (icar), visakhapatnam-530 003, andhra pradesh, india joydev maity department of aquaculture management & technology, vidyasagar university, midnapore - 721102, west bengal, india

the present paper studies the reproductive biology, maturation size and sex ratio of penaeus monodon collected from digha fishing grounds, india during 2011-2013.  a total of 633 individual of p. monodon were examined and among them 242 were males and 391 were females. the overall yearly sex ratio was observed to be 1:1.6 (males: females). based on the results, the spawning season of p. monodon...

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