title: Acid phosphatase activity in pre- and post-spawning hake (Merluccius hubbsi).
abstract: 1. The specific activity of muscle acid phosphatase (E.C. 3.1.3.1.) in pre- and post-spawning hake was investigated. 2. Specific activity values, 0.54 in pre-spawning hakes and 1.64 in post-spawning fish, have been obtained. 3. Using a histochemical test, acid phosphatase has been localized mainly in the connective tissue. The strongest reaction has been observed in post-spawning hake. 4. The increase of the lysosomal activity in the connective tissue may be related to the changes found in the muscle texture associated with spawning.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D000818:Animals; D005260:Female; D005399:Fishes / Q000502:physiology*; D007668:Kidney / Q000166:cytology / Q000201:enzymology; D009132:Muscles / Q000166:cytology / Q000201:enzymology; D010053:Ovary / Q000166:cytology / Q000201:enzymology*; D010058:Oviposition
chemical_list: D000135:Acid Phosphatase