General Overview of Turkish Sea Trout (<i>Salmo trutta</i>L.) Populations

Okumuş, İbrahım; Kurtoğlu, İlker Zeki; Şahin, Şebnem Atasaral

doi:10.1002/9780470996027.ch9

Cited by 13 publications

(16 citation statements)

References 20 publications

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“…Our data are consistent with the general consensus that while at sea, trout typically remain close to their home river, but individual and site-specific variation is considerable (Klemetsen et al 2003). In contrast, sea trout from the northwest Iberian Peninsula, Spain, typically travelled in excess of 200 km from their tagging site in the Ulla River (Caballero et al 2006), and populations in the Black Sea may migrate as far as 900 km from the point of release (Okumus et al 2006 and references therein). In contrast, sea trout from the northwest Iberian Peninsula, Spain, typically travelled in excess of 200 km from their tagging site in the Ulla River (Caballero et al 2006), and populations in the Black Sea may migrate as far as 900 km from the point of release (Okumus et al 2006 and references therein).…”

Section: Discussionsupporting

confidence: 90%

Assigning origins in a potentially mixed‐stock recreational sea trout (Salmo trutta) fishery

Veinott

Westley

Warner

et al. 2012

Ecology of Freshwater Fish

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The anadromous, or sea-going, life history form of brown trout, or sea trout (Salmo trutta), may lead to potential mixing of populations while foraging at sea. In this article, we assess the potential that multiple populations are using common semi-enclosed estuaries and quantify the potential levels of straying (i.e. dispersal) of foreign-produced individuals into populations by using otolith chemical signatures as natural 'tags'. To do so, we created a database of juvenile fish otolith chemistry (a marker of freshwater production) from four rivers and compared the chemistry of harvested fish in two estuaries important to anglers, the Renews River and Chance Cove Brook, to the database. A discriminant function analysis revealed significant differences in the otolith chemistry of juvenile fish inhabiting the four rivers with a 97% cross-validated accuracy when classifying individual juveniles to their natal river, indicating our baseline was robust. When assigning adults caught over 3 years (2007)(2008)(2009) in the recreational fishery in the Renews River estuary, it was determined that over 95% of the fish caught each year originated from Renews River. In contrast, harvested fish in Chance Cove during 2009 were disproportionately comprised of fish produced in Renews River, suggesting the potential for source-sink population dynamics in Newfoundland. Taken as a whole, these results indicate limited population mixing in nearshore estuaries of this region, but also highlight the potential for some populations to subsidise the harvest by anglers in different areas.

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Section: Discussionsupporting

confidence: 90%

Assigning origins in a potentially mixed‐stock recreational sea trout (Salmo trutta) fishery

Veinott

Westley

Warner

et al. 2012

Ecology of Freshwater Fish

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“…Dissolved oxygen was 7.85 ± 1.35 mg L -1 . At 1,3,6,12,24,36,48, and 72 h after the beginning of the experiment, 5 fish per tank (control and experimental) were carefully netted and dried with paper towels before the cutting of the caudal peduncle without being anesthetized. Blood samples (by caudal puncture) were immediately transferred to potassium ethylenediaminetetraacetic acidcoated centrifuge tubes and stored on ice.…”

Section: Thermal Challengementioning

confidence: 99%

“…Free-swimming Black Sea trout are known to move to preferred temperatures due to the constant changes in water temperature. Thus, Black Sea trout migrate from the sea to rivers and creeks at the end of spring and from rivers to the sea to preferred temperatures of 20-25 °C after spawning when the sea temperature is low (1,3). The farming of Black Sea trout in cages limits their movements between the sea and rivers.…”

Section: Introductionmentioning

confidence: 99%

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

Balta¹,

Akhan²,

Balta³

2017

Turk J Vet Anim Sci

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In this study, we aimed to investigate the acute stress responses of Black Sea trout to acute thermal fluctuations. Black Sea trout (184.22 g mean weight) were transferred from a private trout farm to a research center and restocked in a fiberglass square tank. After acclimation to culture conditions (at a water temperature of 15 °C) for 2 weeks, the fish in the experiment were exposed to 25 °C water temperature for 30 min, and the stress responses of the fish were examined at 1, 3, 6, 12, 24, 36, 48, and 72 h. After acute thermal shock, cortisol and glucose levels increased during the first hour in the experimental group. However, cortisol and glucose levels returned to their normal values after 6 and 36 h, respectively. Lysozyme activity decreased at 3 h and rose to its normal level at 12 h after the experiment. Total protein and serum ion concentrations were also affected and fluctuated due to acute thermal stress. Short-term acute thermal exposure also caused a serum ionic imbalance in the trout, but homeostasis was restored at 72 h.

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“…It occurs in rivers flowing from Turkey and other coastal states into the Black Sea. Therefore, it has been called the "Black Sea trout" by Turkish authorities and "Black Sea salmon" in other Black Sea countries (Okumuş et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Şahin¹,

Başçınar²,

Kocabaş³

et al. 2011

Turk. J. Fish. Aquat. Sci.

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Meat yield, biochemical composition, and fatty acid profile of farmed brook trout (Salvelinus fontinalis), Black Sea trout (Salmo trutta labrax) and their hybrids were compared. Hybrids contained significantly higher carcass and meat yield values than brook and Black Sea trout. Although the weight percent head and bone (brook trout as 13.14, 1.66 %, Black Sea trout as 13.52, 1.22 % and their hybrids as 13.92, 1.44 %) of the species were similar, fin, carcass, gonad, liver, internal organs and meat yield of the species were significantly different from each other (P<0.05).

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General Overview of Turkish Sea Trout (Salmo truttaL.) Populations

Cited by 13 publications

References 20 publications

Assigning origins in a potentially mixed‐stock recreational sea trout (Salmo trutta) fishery

Assigning origins in a potentially mixed‐stock recreational sea trout (Salmo trutta) fishery

The physiological stress response to acute thermal exposure inBlack Sea trout (Salmo trutta labrax Pallas, 1814)

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