Muscle growth in Antarctic and Subantarctic notothenioid fishes

Fernández, Daniel A.; Calvo, Jorge; Johnston, Ian A.

doi:10.3989/scimar.2005.69s2325

Cited by 4 publications

(1 citation statement)

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“…They have also been found in Antarctic fishes that swim by pectoral fins movements (Walesby and Johnston ; Davison and MacDonald ; Johnston ; Fernández et al . , ). Many are the histochemical, immunohistochemical and ultrastructural studies reporting small red fibres (sr) with features characteristic of tonic fibres in both the myotomal musculature and fins (Karasinsky and Kilarski ; Calvo and Johnston ; Chayen et al .…”

Section: Discussionmentioning

confidence: 99%

Morphological and histochemical characterization of the pectoral fin muscle of the stripped weakfish, Cynoscion guatucupa

et al. 2014

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The fibres of superficial and deep abductor muscles of the pectoral fins of the stripped weakfish, Cynoscion guatucupa have been studied using histochemical techniques: succinic dehydrogenase (SDH) for mitochondria, periodic acid–Schiff (PAS) for glycogen, myosin‐adenosintriphosphatase (mATPase) to identify different fibre types based on the contraction speed and modified ATPase to identify capillaries. The fibre diameters were measured, and the capillaries of the main fibre types – red, pink and white— were counted. The two muscles showed both macroscopically and microscopically two well‐differentiated zones with predominant white fibres. The area of insertion of muscles into the fin rays had red, pink and white fibres. The origin zone of the muscle into the bone was composed by white fibres only. Both zones of white muscle evidenced a mosaic of small, medium and large polygonal white fibres. Red, pink and white muscles showed a wide histochemical diversity of fibre subtypes. The area per peripheral capillary increased from the red to the white muscles. Due to the predominance of white fibres, the pectoral fins of C. guatucupa were mainly involved in rapid movements to stop/discontinue and stabilize the body during swimming.

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Section: Discussionmentioning

confidence: 99%

Morphological and histochemical characterization of the pectoral fin muscle of the stripped weakfish, Cynoscion guatucupa

et al. 2014

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Pectoral fins of Micropogonias furnieri: a histochemical and ultrastructural study

Devincenti

Díaz

Garcı́a

et al. 2008

Fish Physiol Biochem

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The myotomal fibres of the pectoral fins of white croaker (Micropogonias furnieri) have been studied using histochemical techniques and transmission electron microscopy (TEM). Succinic dehydrogenase (SDH) for mitochondria, periodic acid Schiff (PAS) for glycogen, Sudan Black for lipids and myosin-adenosintriphosphatase (mATPase) pre-incubated at alkaline and acid pHs were used to visualize the contraction velocity. Three zones were determined: superficial (SZ), medium (MZ) and deep (DZ). Staining for SDH, PAS and Sudan Black was positive only in the SZ. The level of alkaline mATPase was the highest in fibres from the DZ, intermediate in the MZ and low in the SZ; at an acid pH, the reverse was obtained. Fibres from the SZ were small with large quantities of subsarcolemmal mitochondria, scarce intermyofibrilar mitochondria and a well-developed sarcoplasmic reticulum; the myofibrils displayed a polygonal distribution along the entire length of the fibre. Fibres in the MZ were larger than those in the SZ, the myofibrils were densely packed, mitochondria prevailed under the sarcolemma and the sarcoplasmic reticulum was not abundant. Fibres from the DZ were the largest, with ribbon-shaped myofibrils and scarce mitochondria. The intercellular space was abundant and nervous endings were frequently observed.

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Fishes of southern South America: a story driven by temperature

Cussac

Fernández

Gómez

et al. 2008

Fish Physiol Biochem

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The latitudinal extension of southern South America imposes a thermal gradient that affects the structure of marine and freshwater fish assemblages and the biology of the species through direct exposure to the temperature gradients or by means of a web of historical and ecological relationships. We have reviewed biological and ecological data of marine and freshwater fishes from the southern Neotropics, including Patagonia, and report several examples of dependence on temperature, from glacial times to today's climate change. We were able to identify historic and present effects on the diversity of fish assemblages, isolation, southern limits for the distribution of species, and morphological variation among populations. There is a wide range of characteristics that exemplify an adaptation to low temperatures, including biochemical peculiarities, physiological adjustments, and alternative life history patterns, and these appear in both freshwater and marine, and native and exotic fishes. The consequences of stable temperature regimes in both the ocean and thermal streams deserve special mention as these shape specialists under conditions of low selective pressure. At present, habitat use and interactions among species are being subject to changes as consequences of water temperature, and some of these are already evident in the northern and southern hemispheres.

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Muscle growth in Antarctic and Subantarctic notothenioid fishes

Cited by 4 publications

References 70 publications

Morphological and histochemical characterization of the pectoral fin muscle of the stripped weakfish, Cynoscion guatucupa

Morphological and histochemical characterization of the pectoral fin muscle of the stripped weakfish, Cynoscion guatucupa

Pectoral fins of Micropogonias furnieri: a histochemical and ultrastructural study

Fishes of southern South America: a story driven by temperature

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