Results 21 to 30 of about 3,789 (261)

Gill raker counting for approximating the ratio of river- and sea-spawning whitefish, Coregonus lavaretus (Actinopterygii: Salmoniformes: Salmonidae) in the Gulf of Bothnia, Baltic Sea [PDF]

Acta Ichthyologica et Piscatoria, 2015
Background. The ability to distinguish between stocks in mixed fisheries is a prerequisite for a sustainable fisheries management. In the Gulf of Bothnia the relative contribution of endangered river-spawning and sea-spawning whitefish, Coregonus ...
M. Himberg, M. Von Numers, A. Vasemägi, J. Heselius S., T. Wiklund, O. Lill J., H. Hägerstrand   +6 more
doaj   +3 more sources

The Tragedy of the Spawning Ground [PDF]

Scientific American, 1916
n ...
openaire   +2 more sources

MORPHOLOGICAL VARIATION OF THREESPINE STICKLEBACK (GASTEROSTEUS ACULEATUS) ON DIFFERENT STAGES OF SPAWNING PERIOD

Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018
This study uses morphometric analysis for better understanding processes occurring during the spawning period in the population of threespine stickleback Gasterosteus aculeatus.
Ahmed S. A. Dorgham, Pavel Golovin, Tatiana Ivanova, Mikhail Ivanov, Pavel Saveliev, Dmitry Lajus   +5 more
doaj   +1 more source

Molecular and Morphological Identification and Seasonal Distribution of Eggs of Four Decapterus Fish Species in the Northern South China Sea: A Key to Conservation of Spawning Ground

Frontiers in Marine Science, 2020
Although species of Decapterus form important pelagic fisheries in the northern South China Sea, information on their spawning grounds is limited because identification of fish eggs based on their morphology is difficult.
Gang Hou, Jinrun Wang, Zuozhi Chen, Zuozhi Chen, Jinlong Zhou, Wangsu Huang, Hui Zhang, Hui Zhang, Hui Zhang   +8 more
doaj   +1 more source

Study on the spawning habitat suitability of four major Chinese carps in the fluctuating backwater area of the Three Gorges Reservoir

Ecological Indicators, 2022
The upstream of the Yangtze River has abundant fish resources and is home to the four major Chinese carps (FMCCs), which are economically important fish in the Yangtze River that reside in the fluctuating backwater area (FBA) of the Three Gorges ...
Yi Xiao, Jinghong Deng, Shengfa Yang, Jiang Hu, Li Wang, Wenjie Li   +5 more
doaj   +1 more source

LIMITS AND OPERATIONAL EVALUATION OF THE SPAWNERS ESCAPEMENT TO THE SPAWNING GROUNDS AS TOOLS FOR PROSPECTIVE AND SHORT-TERM MANAGEMENT OF THE PACIFIC SALMON STOCKS IN THE RIVERS OF THE FAR-EASTERN FISHERIES BASIN

Известия ТИНРО, 2019
The major aspects of density regulation of the pacific salmons spawning are analyzed. Uncertainty of the ecological parameters considered traditionally as indicators of the salmons reproduction efficiency is discussed.
E. A. Shevlyakov, M. G. Feldman, V. I. Ostrovsky, V. V. Volobuev, A. M. Kaev, E. V. Golub, E. I. Barabanshchikov, I. S. Golovanov   +7 more
doaj   +1 more source

Distribution and spawning area of Atlantic salmon Salmo salar L. in the River Ura (the Murmansk Region)

Vestnik MGTU, 2019
The development of measures to preserve the population of Atlantic salmon has been carried out on the basis of the results of studying the state of its habitat and the conditions of reproduction.
S. I. Dolotov , I. V. Samokhvalov
doaj   +1 more source

Protection of spawning habitat for potamodromous fish, an urgent need for the hydropower planning in the Andes

Neotropical Ichthyology, 2021
Because dams block migratory routes of potamodromous fish to their spawning areas, and energy generation changes natural flow seasonality, it is necessary to identify spawning areas and their conditions. This information will help in management decisions
Cintia Moreno-Arias, Silvia López-Casas, Carlos A. Rogeliz-Prada, Luz Jiménez-Segura   +3 more
doaj   +1 more source

Differential larval growth strategies and trophodynamics of larval Atlantic bluefin tuna (Thunnus thynnus) from two discrete spawning grounds

Frontiers in Marine Science, 2023
Atlantic bluefin tuna (ABT), Thunnus thynnus, is a globally important fishery resource. This oceanic top predator undertakes long-distance migrations from its nutrient-rich feeding grounds in the north Atlantic to oligotrophic spawning grounds.
Estrella Malca, Estrella Malca, Estrella Malca, José M. Quintanilla, Trika Gerard, Francisco Alemany, Tracey Sutton, Alberto García, John T. Lamkin, Raúl Laiz-Carrión   +9 more
doaj   +1 more source

Projecting the Shift of Chub Mackerel (Scomber japonicus) Spawning Grounds Driven by Climate Change in the Western North Pacific Ocean

Fishes
Spawning grounds may shift due to climate change and subsequent variations in the marine environment, but few studies have aimed to project shifts in the spawning grounds of chub mackerel driven by climate change.
Seonggil Go, Joon-ho Lee, Sukgeun Jung
doaj   +1 more source