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SPATIAL AND SEASONAL PATTERNS IN SPECIES COMPOSITION AND OCCURRENCE OF FISH LARVAE IN THE AREA OF THE CANARY ISLANDS, EASTERN CENTRAL ATLANTIC

Family BOTHIDAE Arnoglossus spp. Bleeker, 1862 Arnoglossus imperialis (Rafinesque, 1810) Arnoglossus rueppelii (Cocco, 1844) Bothus podas (Delaroche, 1809) Family BALISTIDAE Balistes capriscus Gmelin, 1789 Family TETRAODONTIDAE Canthigaster capistrata (Lowe, 1839) Sphoeroides spp. Anonymous, 1798

neritic to bathydemersal neritic to bathydemersal neritic to bathydemersal neritic to bathydemersal

9 4 1 16

neritic

3

neritic neritic

1 8

3.2. ANNOTATED LARVAE TAXA LIST

¬ Albuliformes NOTACANTHOIDEI In the leptocephali of the Notacanthoidei the most important character are the V-shaped myomeres and instead of a normal caudal fin a post-caudal filament is present. These two diagnostic characters in combination is leading to this suborder, but it should be verified by the further characters. The dorsal and pelvic fins are present and the pectoral fin is small. The gut is strait and subterminal. The pigmentation consists of a ventral series of melanophores and sometimes a row below the midlateral level.

-- Reference: CASTLE (1984);

¬ Anguilliformes In most families is the body slender.The number of myomeres can reach up to 290 and are W-shaped.The pectoral fins are reduced or lost.The leptocephalis have a leaf-like body shape and are almost transparent except for the eyes and the pigmentation. The head is small and the teeth are directed forward.Two developmental larval stages are known (Figure 7), which are easy identifiable. The engyodontic stage is defined by the needle-like teeth, an unformed nasal capsule, an undifferentiated medial finfold and hypurals. Leptocephalis larger than 20 mm TL are

Figure 7. Engyodontic and euryodontic stage of a congrid leptocephalus (CASTLE 1984)

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

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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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