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3 RESULTS

-- Remark: I could distinguish two different types of larvae due to their different pigmentation patterns. But neither via the pigmentation pattern or fin ray counts the larvae could have been identified to a lower taxonomic level. Some further larvae could not be allocated to one of the distinguished types because of their bad condition. Type I gobies had a double row of stellate melanophores along the dorsal fin base (Figure 67) and Type II gobies had a blotch behind the dorsal fin base (Figure 68).

-- Reference: LEIS and RENNIS (1983); RUPLE (1984); YEUNG and RUPLE (2006);

-- Reference material: 882 specimens; 11/97: S4 (P782233-246; P782260-782847); S7 (P782849); S10 (P781972-782232); S13 (P781968-971; P782247-255); S16 (P782256-259); 04/99: S16 (P782848);

-- Distribution: Type I gobies was only found in autumn and mainly at neritic stations within a depth range of 20 – 66 m during the day as well as during the night. The highest number was caught northeast of Lanzarote and a lower number was each found southeast of Fuerteventura and west of Gran Canaria. Some larvae occurred also at an epipelagic station southeast of Fuerteventura in a depth of 90 – 107 m during late night, almost dawning. The type II gobies larvae were found only at neritic stations in autumn, so southeast of Fuerteventura and Lanzarote in a depth range of 13 – 42 m during the day and west of Gran Canaria at a depth of 42 – 66 m during the night. In the spring some specimens were caught at a neritic station southwest of Gran Canaria at 18 – 61 m depth in night. Some specimens were damaged or the pigments vanished, that identification was not possible. Larvae were caught at an epipelagic station southeast of Fuerteventura at a depth of 90 –107 m at late nighttimes, almost morning in autumn.

•  Crystallogobius linearis Meristics: Vertebrae:

29 – 31

Dorsal spines + rays:

Males: II – III + I + 18 – 20 Females: 0 or rudimentary

Anal spine + rays:

I + 20 – 21

Pectoral rays:

15 – 19

-- Morphology: The body is elongate and laterally compressed. The entire body is transparent, so that internal melanophores and the gas bladder are clearly visible. Although the preserved specimens studied were not transparent anymore the melanophores on the gas bladder were still clearly visible (Figure 65). Sexual dimorphism is developed. Males form two front canine teeth in lower jaw when adult. The pelvic disc is deep in males but reduced or lacking in females. The first dorsal fin is differently developed in males and females (Figure 65).

-- Reference: MILLER (1986);

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Inf. Téc. Inst. Canario Cienc. Mar. n°13

Spatial and seasonal patterns in species composition of fish larvae in the Canary Islands  

Technical report consisting on a comprehensive annotated larvae taxa list with the most important taxonomic characters of this region

Spatial and seasonal patterns in species composition of fish larvae in the Canary Islands  

Technical report consisting on a comprehensive annotated larvae taxa list with the most important taxonomic characters of this region

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