Results 31 to 40 of about 3,638 (297)

Integrating habitat restoration and fisheries management : A small-scale case-study to support EEL conservation at the global scale

Knowledge and Management of Aquatic Ecosystems, 2013
The aim of this work was to develop a methodological framework for the management of local eel stocks that integrates habitat restoration with optimal fishery management.
Ciccotti E., Leone C., Bevacqua D., De Leo G., Tancioni L., Capoccioni F.   +5 more
doaj   +1 more source

Reproductive biology of Garra regressus and Garra tana (Cypriniformes: Cyprinidae) from Lake Tana, Ethiopia

Journal of Threatened Taxa, 2015
The reproductive biology of Garra regressus and Garra tana was investigated by collecting monthly samples (January to December 2006) from the southern Gulf of Lake Tana, where these species are endemic.  Garra regressus has an extended breeding time from
Akewake Geremew, Abebe Getahun, Eshete Dejen   +2 more
doaj   +3 more sources

Biological characteristics for the spawners of chum salmon Oncorhynchus keta caught in the Indigirka River in 2023

Известия ТИНРО
The main biological parameters of chum salmon Oncorhynchus keta are presented for the spawners caught during the research expedition conducted to the lower reaches of Indigirka in August-September 2023.
A. I. Nikiforov, L. N. Karpova
doaj   +1 more source

Recurrent die-offs of adult coho salmon returning to spawn in Puget Sound lowland urban streams.

PLoS ONE, 2011
Several Seattle-area streams in Puget Sound were the focus of habitat restoration projects in the 1990s. Post-project effectiveness monitoring surveys revealed anomalous behaviors among adult coho salmon returning to spawn in restored reaches.
Nathaniel L Scholz, Mark S Myers, Sarah G McCarthy, Jana S Labenia, Jenifer K McIntyre, Gina M Ylitalo, Linda D Rhodes, Cathy A Laetz, Carla M Stehr, Barbara L French, Bill McMillan, Dean Wilson, Laura Reed, Katherine D Lynch, Steve Damm, Jay W Davis, Tracy K Collier   +16 more
doaj   +1 more source

Parr survey data and associated spawner densities

, 2013
Parr survey data and associated spawner ...
Scheuerell, Mark D., Thorson, James T., Buhle, Eric R., James T. Thorson (141979), Mark D. Scheuerell (648157), Eric R. Buhle (346002), Copeland, Timothy, Timothy Copeland (3265830)   +7 more
core   +1 more source

Thermal conditions and age structure determine the spawning regularities and condition of Baltic herring (Clupea harengus membras) in the NE of the Baltic Sea [PDF]

PeerJ, 2019
Baltic herring (Clupea harengus membras) is a total spawner with a group-synchronous ovarian organization. Age polymodality in total spawners is considered an important factor in assuring that a strong population is sustainable under an intensive ...
Timo Arula, Heli Shpilev, Tiit Raid, Elor Sepp   +3 more
doaj   +2 more sources

Spawning seasons of Rasbora tawarensis (Pisces: Cyprinidae) in Lake Laut Tawar, Aceh Province, Indonesia

Reproductive Biology and Endocrinology, 2010
Background Rasbora tawarensis is an endemic freshwater fish in Lake Laut Tawar, Aceh Province, Indonesia. Unfortunately, its status is regarded as critical endangered with populations decreasing in recent years.
Musman Musri, Muchlisin ZA, Azizah MN Siti   +2 more
doaj   +1 more source

Relative percent change in McKenzie River Chinook spawner abundance predicted by percent increase in spring subyearlings; percent change is relative to baseline median predicted value for spawner abundance.

, 2019
Relative percent change in McKenzie River Chinook spawner abundance predicted by percent increase in spring subyearlings; percent change is relative to baseline median predicted value for spawner abundance.
Lyndal L. Johnson (2670739), Nathaniel L. Scholz (13189), Julann A. Spromberg (545131), Jeffrey C. Jorgensen (6499310), James M. Myers (3243981), Paul M. Chittaro (6499313), Jessica I. Lundin (843938), Richard W. Zabel (2913059), Robert M. Neely (6499316)   +8 more
core   +1 more source

Searching for threshold shifts in spawner–recruit data

Canadian Journal of Fisheries and Aquatic Sciences, 2009
Relationships between spawning fish (S) and surviving offspring (recruits, R) are typically assumed to be continuous and nonlinear. However, R may change abruptly with small changes in S if population-, community-, or ecosystem-scale processes trigger low adult reproduction and cause populations to shift abruptly to regimes of low recruitment.
Garvey, James E, Wright, Russell A, Marschall, Elizabeth A   +2 more
openaire   +2 more sources

Modeled percent differences in spawner abundance between current conditions and conditions under the four future temperature scenarios for all four salmon and steelhead populations.

, 2022
Numbers above and below bars represent the total change in spawner abundance. Modeled spawner abundance under current conditions was approximately 1,000 for spring-run Chinook salmon, 96,000 for coho, 32,000 for fall-run Chinook salmon, and 15,000 for ...
Britta Timpane-Padgham (5920400), John Winkowski (12858991), Timothy J. Beechie (11414183), Colin L. Nicol (12858985), Gustav Seixas (7555094), Peter Kiffney (12858988), Caleb B. Fogel (12858982), Jeffrey C. Jorgensen (6499310)   +7 more
core   +1 more source