Results 51 to 60 of about 2,370 (192)

Effects of Sediment‐Control Operations on Fish and Macroinvertebrate Communities in Dam Reservoirs

River Research and Applications, EarlyView.
ABSTRACT Sediments are avoided in many river and dam managements because of their adverse effects on water usage and flood control. Recently, sedimentation control measures, including sluicing, have been employed to manage sediments in river channels and restore communities in dammed rivers.
Daisuke Nakano, Jumpei Suzuki, Ryotaro Mori, Yusuke Shinyama, Yuuichi Kitago, Takashi Ihara, Tsuyoshi Saito   +6 more
wiley   +1 more source

Current state of resources for japanese flying squid Todarodes pacificus in the northwestern Tatar Strait (Japan Sea)

Известия ТИНРО, 2020
Data on commercial catches of japanese flying squid Todarodes pacificus in the northwestern Tatar Strait in 2003–2019 are analyzed. To assess the resours status in the study area, the relative number (individuals per jigger winch per hour) and biomass ...
P. A. Dulenina, E. I. Ustinova, A. A. Dulenin   +2 more
doaj   +1 more source

Effects of the Invasive Round Goby on Swedish Recreational Fishing Values

Fisheries Management and Ecology, EarlyView.
ABSTRACT The round goby, an invasive fish from the Black and Caspian Seas, has spread to Swedish waters, threatening recreational fisheries. We modeled impacts on the future recreational fishery in Sweden using data from a recreational fishing survey, and estimated effects of the round goby on other fish species. Values attached to recreational fishing
Göran Bostedt, Ola Carlén, Rahmat Naddafi, Ann‐Britt Florin   +3 more
wiley   +1 more source

Standardization of CPUE for walleye pollock in the Okhotsk Sea with inclusion of some environmental factors

Известия ТИНРО, 2020
Catch of walleye pollock by Russia is the highest in the northern Okhotsk Sea where on average 0.94 million metric tons were caught annually in the period between 1962 and 2017, or around 24 % of the total yield of Russian fishery.
V. V. Kulik, A. I. Varkentin, O. I. Ilyin   +2 more
doaj   +1 more source

Disentangling the Drivers of a Piscivorous Intra‐Annual Cohort and the Contributions of Three Cohorts to Early‐Year Class Strength in Pikeperch (Sander lucioperca)

Fisheries Management and Ecology, EarlyView.
ABSTRACT Using pikeperch (Sander lucioperca) as a model species, we investigated the factors influencing fluctuations in the abundance of piscivorous intra‐annual cohorts and assessed the role of three distinct cohorts: extremely small (ES), ordinary (or mid‐sized) fingerlings, and piscivorous in shaping year‐class strength.
Million Tesfaye, Tomáš Jůza, Marek Šmejkal, Katerina Soukalová, Daniel Bartoň, Petr Blabolil, Martin Čech, Josef Hejzlar, Marie Prchalová, Milan Muška, Michal Tušer, Luboš Kočvara, Zuzana Sajdlová, Vladislav Draštík, Carlos Martinez, Karlos Ribeiro de Moraes, Milan Říha, Mojmír Vašek, Radka Symonová, Marek Brabec, Jan Kubečka, Allan T. Souza   +21 more
wiley   +1 more source

Using Catch Data to Estimate Changes in Global Commercial Abalone Abundance

Fisheries Management and Ecology, EarlyView.
ABSTRACT Changes in global wild capture production of abalone are explored to infer potential changes in biological stocks. The study found that 77% (or 10 out of the 13) of the countries that reportedly caught abalone in the wild have experienced declines in catches between 1980 and 2023, and on aggregate catch declined by almost 83% between 1980 and ...
Douglas Crookes
wiley   +1 more source

Examining the Impact of Derelict Pots on Blue Crab (Callinectes sapidus) Catch and Harvest Within a Recreational Fishery

Fisheries Management and Ecology, EarlyView.
ABSTRACT Derelict fishing gear can negatively affect marine ecosystems through mortality in coastal environments. This study explored the impact of derelict and active crab pots on recreational blue crab (Callinectes sapidus) catch rates and landings in a Mid‐Atlantic estuary by deploying experimental pots in four habitat strata within three sections ...
Randy J. Feris Serrano, Jennifer E. Repp, Kaylin M. Regan, Arthur C. Trembanis, Matthew J. Oliver, Edward A. Hale   +5 more
wiley   +1 more source

Assessment of the efficiency of Funnel net and Hokkaido traps for Astacus leptodactylus Eschscholtz, 1823 catching in ponds [PDF]

بوم‌شناسی آبزیان, 2020
Various fishing tools have been used for catching Astacus leptodactylus in the world. In this research, a trap was specially designed for crayfish fishing with some changes in the shape and dimensions of the Hokkaido trap, and its efficiency was compared
Mohammad Javad Vesaghi, Iman Sourinezhad, Ali asghar Khanipour, Alireza Valipour, Ehsan Kamrani   +4 more
doaj  

Updated GLMM standardisation of the commercial abalone CPUE for Zone F

, 2022
This paper presents an update of the standardisation of the abalone CPUE for Zone F using a GLMM approach proposed by Brandão and Butterworth (2012), which adds new data for the 2011/12 to 2013/2014 fishing “years” for that Zone. The standardised CPUE indices have been fairly stable since2007/08 fishing “year”, with a slight drop in the latest year.
Brandao, Anabela, Butterworth, Doug
openaire   +1 more source

Evidence of deterrence from patrol data: Trialling application of a differenced‐ CPUE metric

Conservation Science and Practice, 2022
Abstract Ranger‐led law enforcement patrols are the primary, site‐level response to – and the most common source of data on – illegal activity threatening wildlife in protected areas. Yet evidence that patrols effectively deter rule‐breaking is limited, and common management metrics for evaluating deterrence, which use ranger ...
Anthony Dancer, Aidan Keane, Colin M. Beale, Andrew D. M. Dobson, Rajan Amin, Robin Freeman, Inaoyom Imong, Kate E. Jones, Matthew Linkie, Barney Long, Francis O. Okeke, Andrew J. Plumptre, J. Marcus Rowcliffe, Emma J. Stokes, Elsabé van der Westhuizen, Ben Collen   +15 more
openaire   +5 more sources