Results 51 to 60 of about 7,225 (188)

Competitive exclusion, not predation, likely drove the decline in native fish diversity following carnivorous fish introductions to Lake Titicaca in the mid‐20th century

open access: yesJournal of Fish Biology, EarlyView.
Abstract Lake Titicaca is a continental centre for ichthyological biodiversity, with over 90% of native species being endemic. However, these species face significant threats from invasive species, particularly from invasive salmonids and invasive Argentine pejerrey.
Daniel A. Villar   +3 more
wiley   +1 more source

Impact of restocking on the zooplankton community in Lake Jošava

open access: yes, 2021
Istraživanje je provedeno na jezeru Jošava (Đakovo) na pelgijalnim (P1-P4) i litoralnim (L1-L4) postajama tijekom tri termina uzorkovanja 2018. godine prije i nakon poribljavanja jezera konzumnim šaranom (Cyprinus carpio).
Jedvaj, Elena
core  

ÉVOLUTION SPATIO-TEMPORELLE DE LA CONTRIBUTION DU REPEUPLEMENT EN TRUITE (SALMO TRUTTA L.) RÉALISÉ A DES STADES PRÉCOCES DANS LE BASSIN AMONT DU FIER (74).

open access: yesKnowledge and Management of Aquatic Ecosystems, 2002
Les pratiques de repeuplement en truite à des stades précoces (alevins nourris et truitelles 3-5 cm) ont été évaluées par la technique de fluoromarquage des otolithes sur le bassin amont du Fier pour trois cohortes (1995, 1996, 1997).
CAUDRON A., CHAMPIGNEULLE A.
doaj   +1 more source

Migration pattern of Atlantic salmon smolts Salmo salar L. released at different sites in the River Drammenselv, SE Norway

open access: yesFauna Norvegica, 1990
Hatchery-reared smolts of Atlantic salmon Salmo salar L. of the River Drammenselv stock were released at four different sites in the River Drammenselv system; (1) at Gol, (2) at Kaggefoss, (3) at Hellefoss and (4) in the estuary at Svelvik.
Per Pethon, Lars P. Hansen
doaj   +1 more source

Challenging Host Specificity: Malacosporean Parasite Dynamics—Tetracapsuloides bryosalmonae Beyond Salmonids—An Infection Experiment

open access: yesJournal of Fish Diseases, EarlyView.
ABSTRACT Proliferative Kidney Disease (PKD) is a severe parasitic disease of salmonids caused by the malacosporean endoparasite Tetracapsuloides bryosalmonae. In the fish intermediate host, the parasite is disseminated via the circulatory system and ultimately reaches the kidney, where it matures before releasing infective spores into the environment ...
Céline Möckli   +4 more
wiley   +1 more source

Conspecifics can be aliens too a review of effects of restocking practices in vertebrates

open access: yes, 2012
We review the indexed scientific literature (233 papers) dealing with ‘restocking’ of vertebrates, i.e. reinforcement of wild populations by release of individuals of the same species. We found evidence that restocking may have desired beneficial effects
Champagnon, Jocelyn,   +4 more
core   +1 more source

Conservation and Captive Breeding of the Asian Houbara Bustard (Chlamydotis macqueenii)

open access: yesBiology
The Houbara Bustard (Chlamydotis macqueenii) is a vulnerable species found in arid and semi-desert regions of the Middle East and Central Asia. In recent decades, Houbara populations have significantly declined due to overhunting, habitat loss, and ...
Hanan Al-Khalaifah, Afaf Al-Nasser
doaj   +1 more source

DYNAMIQUE TEMPORELLE DE LA CONTRIBUTION DU REPEUPLEMENT EN STADES PRÉCOCES DE TRUITE (SALMO TRUTTA L.) DANS LA POPULATION EN PLACE ET DANS LA PÊCHE SUR LE DOUBS FRANCO-SUISSE.

open access: yesKnowledge and Management of Aquatic Ecosystems, 2002
La technique de fluoromarquage des otolithes a permis d’évaluer à grande échelle les pratiques d’alevinage de truite (Salmo trutta L.) à des stades précoces (540 000-570 000 alevins/an, la plupart vésiculés) pour trois cohortes (1994-95-96) dans une ...
CHAMPIGNEULLE A.   +3 more
doaj   +1 more source

A Study of the Proper Amount of Work-in-Process Inventory for Multipurpose Intermediate Products

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2012
It is difficult to calculate the amount of inventory of intermediate products in a material processing factory which has complex multiple processes. If the amount is too great, inventory assets accumulate. On the other hand, if it is too small, tardiness
Rihito IZUTSU   +2 more
doaj   +1 more source

Mortality in Salmon (Salmo salar) Fry Related to Lipoid Liver Disease Induced by Unbalanced Fatty Acid Composition of the Diet

open access: yesJournal of Fish Diseases, EarlyView.
ABSTRACT In 2023, all but one Swedish restocking farm rearing Baltic salmon and sea trout fry experienced massive mortality caused by lipoid liver disease (LLD). The struck farms used the same feed, and this was suspected to be the cause of the outbreak.
Caroline Ek, Lo Persson, Charlotte Axén
wiley   +1 more source

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