males and females are 35 and 40 years, respectively (Nammack 1982). The species bears live young, with a gestation period of about 18 to 22 months, and produce between 2 to 15 pups with an average of 6. Size at maturity for females is around 80 cm, but can vary from 78 cm to 85 cm depending on the abundance of females. (Sosebee 2005).
“The spiny dogfish is a small schooling shark that forms groups of hundreds or thousands of individuals of the same sex and size. It is one of the most abundant demersal shark species. This shark is gray or brownish on top and pale gray or white on its ventral side with irregular white spots on the top or sides of the body. The second dorsal fin is smaller than the first and both fins have spines at their origin. The caudal fin is asymmetrical with the upper lobe being larger. The smooth edged short and oblique teeth are similar in both the upper and lower jaw.” Habitat:
They prefer to have temperatures from 45 to 55 degrees Fahrenheit. Spiny dogfishes are located inshore and offshore of the continental and insular shelf and upper slopes and are usually found near the bottom (but also in mid-water...