scholarly journals The Growth Parameters of the Mako Shark Isurus Oxyrinchus (Rafinesque, 1810) in the Moroccan Central Atlantic Coast

2021 ◽  
Vol 25 (3) ◽  
pp. 119-136
Author(s):  
Jihade Alahyene et al.
Keyword(s):  
Growth Parameters ◽  
Atlantic Coast ◽  
Mako Shark ◽  
Isurus Oxyrinchus ◽  
Central Atlantic

Tagging studies on the Shortfin Mako Shark (Isurus oxyrinchus) in the Western North Atlantic

1992 ◽  
Vol 43 (1) ◽  
pp. 45 ◽  
Author(s):  
JG Casey ◽  
NE Kohler
Keyword(s):  
North Atlantic ◽  
Atlantic Coast ◽  
Mako Shark ◽  
Isurus Oxyrinchus ◽  
Shortfin Mako ◽  
Straight Line ◽  
Straight Line Distance ◽  
Mid Atlantic Ridge ◽  
Migratory Patterns ◽  
National Marine Fisheries Service

Results of an ongoing Cooperative Shark Tagging Program conducted by the National Marine Fisheries Service (USA) are described. In all, 2459 shortfin mako sharks (Isurus oxyrinchus) were tagged off the Atlantic coast of North America and in the Gulf of Mexico in the 28-year period between 1962 and 1989. The sharks were tagged by volunteer fishers, scientists aboard research vessels, and US Foreign Fisheries Observers on foreign vessels fishing in US waters. Altogether, 231 recaptures (9.4% of releases) of these tagged sharks have been reported by fishers from 16 countries. The maximum time at liberty is 8.2 years, and the maximum straight-line distance between tag and recapture localities is 2452 nautical miles. One tag was recovered from the European side of the Mid-Atlantic Ridge. Mako shark distribution and migratory patterns in relation to water temperature are discussed for the western North Atlantic.

Age and growth of the shortfin mako (Isurus oxyrinchus) in the south-eastern Pacific off Chile

2009 ◽  
Vol 60 (5) ◽  
pp. 394 ◽  
Author(s):  
Francisco Cerna ◽  
Roberto Licandeo
Keyword(s):  
Growth Parameters ◽  
Eastern Pacific ◽  
Age And Growth ◽  
The South ◽  
Age Classes ◽  
Vertebral Centra ◽  
South Eastern ◽  
Isurus Oxyrinchus ◽  
Shortfin Mako ◽  
Longline Fisheries

The shortfin mako, Isurus oxyrinchus, is a large pelagic shark with a widespread global distribution. However, very little is known about most aspects of this species for the south-eastern Pacific. In the present paper, the age and growth parameters of the shortfin mako, caught by Chilean swordfish longline fisheries from 2004 to 2005, are reported. Ages were estimated by counting band-pairs from sections of vertebral centra from 547 individuals, ranging from 76 to 330 cm in total length (TL). Trends in the proportion of opaque edges for all ages combined and grouped into ages 0–6 and 7–26 years indicated that they are formed during summer and showed that annually, one band-pair is formed in the vertebrae of shortfin makos. Modal-progression analysis was used to verify the first three age classes (ages 0–2 years). For both sexes, the oldest estimated age was 25+ years. Von Bertalanffy growth parameters were estimated at L∞ = 325.29 cm TL, K = 0.076 year–1 and t0 = –3.18 years for females and L∞ = 296.60 cm TL, K = 0.087 year–1 and t0 = –3.58 years for males. The results indicated that this species is highly vulnerable to exploitation and, thus, urgent conservation measures are required.

AGE AND GROWTH OF THE BLUE SHARK PRIONACE GLAUCA IN THE EASTERN ATLANTIC OCEAN

KSTU News ◽  
2021 ◽  
pp. 11-25
Author(s):  
Beraki Weldegiorgish Teklekhaimanot ◽  
Sergey Vadimovich Shibaev ◽  
Sergey Yurievich Gulyugin
Keyword(s):  
Atlantic Ocean ◽  
Growth Parameters ◽  
Growth Function ◽  
Age And Growth ◽  
Growth Band ◽  
Prionace Glauca ◽  
Western Africa ◽  
Eastern Atlantic Ocean ◽  
Digital Microscope ◽  
Central Atlantic

In this study, 292 blue sharks Prionace glauca (Linnaeus, 1758) (from 151 to 305 cm total length, TL) were collected off western Africa in the eastern central Atlantic Ocean between 1980 and 1982. Vertebral sections of females specimens ranged from 175 to 300 cm and males specimens ranged from 166 to 312 cm TL were processed and analyzed for age and growth parameters. Growth band pairs (translucent and opaque bands) were counted on the images photographed from the stained whole vertebrae using digital microscope called Digi Scope II. The band pairs after the birthmark were counted from 3 to 12 for males and from 4 to 13 for females. Growth parameters were derived using the Von Bertalanffy growth function (VBGF) based on FISAT and solver solution Microsoft excel and Ford Wall-Ford. VBGF was that which best fit the data. Parameters derived from the combination of observed and back-calculated lengths, K = 0.1, L_∞ = 386.4 cm and t_0 = −1.35 year for males and K = 0.12 year -1, L_∞= 355 cm and t_0 = –1.02 year for females were considered to best describe growth. The longevity was estimated to be at least 23.7 and 28.3 years for females and males respectively. The natural mortality rate was estimated to be 0.15 year - 1 and 0.18 year -1 for males and females respectively.

scholarly journals Erratum to: Morphological Characterization and Hydrodynamic Behavior of Shortfin Mako Shark (Isurus oxyrinchus) Dorsal Fin Denticles

2019 ◽  
Vol 16 (5) ◽  
pp. 965-965 ◽  
Author(s):  
Patricia Fernandez-Waid ◽  
Guzman Diez ◽  
Iñigo Bidaguren ◽  
Urtzi Izagirre ◽  
Jesus Maria Blanco ◽  
...  
Keyword(s):  
Morphological Characterization ◽  
Hydrodynamic Behavior ◽  
Mako Shark ◽  
Dorsal Fin ◽  
Isurus Oxyrinchus ◽  
Shortfin Mako

scholarly journals On the recent occurrences of shortfin mako shark, Isurus oxyrinchus (Rafinesque, 1810) in the Adriatic Sea

2018 ◽  
Vol 59 (2) ◽  
pp. 237-243
Author(s):  
David Udovičić ◽  
Pero Ugarković ◽  
Frane Madiraca ◽  
Branko Dragičević
Keyword(s):  
Adriatic Sea ◽  
Nursery Area ◽  
Mako Shark ◽  
Isurus Oxyrinchus ◽  
Photographic Evidence ◽  
Shortfin Mako

Eight individuals of the shortfin mako shark, Isurus oxyrinchus (Rafinesque, 1810) have been recorded in the period from 2014 to 2017 in the Adriatic Sea. The specimens presented in the paper were identified on the basis of photographic evidence. Occurrences of juvenile specimens suggests that Adriatic Sea could serve as a nursery area for this species, especially its eastern part. A review of the previously documented occurrences of this species in the Adriatic Sea is given in this article.

Ingestion of microplastics by pelagic fish from the Moroccan Central Atlantic coast

2020 ◽  
Vol 261 ◽  
pp. 114194 ◽  
Author(s):  
Hind Maaghloud ◽  
Rachida Houssa ◽  
Soukaina Ouansafi ◽  
Fatima Bellali ◽  
Karima El Bouqdaoui ◽  
...  
Keyword(s):  
Atlantic Coast ◽  
Pelagic Fish ◽  
Central Atlantic

Coronary artery reactivity in the mako shark, Isurus oxyrinchus

1991 ◽  
Vol 69 (2) ◽  
pp. 375-379 ◽  
Author(s):  
Anthony P. Farrell ◽  
Peter S. Davie
Keyword(s):  
Coronary Artery ◽  
Coronary Arteries ◽  
Vascular Rings ◽  
Mako Shark ◽  
Isurus Oxyrinchus ◽  
Prostaglandin F ◽  
Elasmobranch Fishes

Vasoactivity was examined in isolated vascular rings from the coronary arteries of the mako shark, Isurus oxyrinchus, a representative of the athletic elite among elasmobranch fishes. Adenosine relaxed vascular rings. ADP contracted vascular rings at concentrations less than 0.1 mM and relaxed them at higher concentrations. Theophylline inhibited both the ADP-mediated contraction and adenosine-mediated relaxation. Prostaglandin F2α produced strong constrictions. Serotonin had no vasoactive effect. Adrenaline and noradrenaline produced relaxations, indicating a population of β-adrenoceptors. ACh produced weak relaxations at concentrations greater than 10 μM. With the notable exception of the response to adenosine, these vasoactive responses were similar to those previously observed for the coronary arteries in another elasmobranch, the rough skate (Raja nasuta).

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