Morphology and development of the multiple lateral line canals on the trunk in two species of
Hexagrammos (Scorpaeniformes, Hexagrammidae).
We selected two common species found in the northern coastal areas of China, Sebastes schlegelii and
Hexagrammos otakii, two of the most typical reef fishes in this area.
40 0.13 (0.08) flavidus YOY Heterostichus rostratus 23 0.30 (0.15) Sebastes semicinctus 29 0.22 (0.18) Synodus lucioceps 1 0.00 (0.00) Oxylebius pictus 12 0.09 (0.04) Sebastes mystinus 1 0.00 (0.00) Sebastes auriculatus 17 0.00 (0.00) Scorpaenichthys mannoratus 7 0.07 (0.04)
Hexagrammos decagrammus 2 0.00 (0.00) Pleuronichthys coenosus 6 0.04 (0.03) Gibbonsia spp.
Sympatric species of
Hexagrammos in the northeastern Pacific show similar patterns of segregation (Crow et al., 2010).
Number of Species specimens Order Clupeiformes (0.1%) Pacific herring (Clupea pallasii) 1 Order Salmoniformes (6.8%) Arctic cisco (Coregonus autumnalis) * 15 Sheefish (Stenodus leucichthys) * 1 Arctic grayling (Thymallus arcticus) * 4 Arctic char (Salvelinus alpinus) * 21(1) Lake trout (Salvelinus namaycush) 6 Order Osmeriformes (0.1%) Capelin (Mallotus villosus) 0(1) Order Gadiformes (2.3%) Polar cod (Arctogadus glacialis) * 3 Arctic cod (Boreogadus saida) * 11(1) Greenland cod (Gadus ogac) * 1 Order Gasterosteiformes (37.8%) Ninespine stickleback (Pungitius pungitius) * 260(4) Order Scorpaeniformes (52.2%) Whitespotted greenling (
Hexagrammos stelleri) 1 Threaded sculpin (Gymnocanthus pistilliger) * 1(1) Arctic staghorn sculpin (Gymnocanthus tricuspis) * 2 Myoxocephalus sp.
Concentrated spermatozoa were obtained from a lancelet (Branchiostoma belcheri) and 35 fish species (Deania calcea, Chimaera phantasma, Sardinops melanostictus, Engraulis japonica, Osmerus eperlanus mordax, Spirinchus lanceolatus, Hypomesus pretiosus japonicus, Hypomesus transpacificus nipponensis, Plecoglossus altivelis altivelis, Salangichthys microdon, Oncorhynchus mykiss, Hypoptychus dybowskii, Aulichthys japonicus, Gasterosteus aculeatus, Syngnathus schlegeli,
Hexagrammos agrammus,
Hexagrammos octogrammus,
Hexagrammos otakii, Pseudoblennius cottoides, Rhinogobius sp.
x Cancer gracilis x Cancer gracilis (juvenile) x Cancer magister (juvenile) x Cancer oregonensis x x x Cancer oregonensis (gravid) x x Cancer oregonensis (juvenile) x Cancer productus (juvenile) x x Caprellid amphipods x Chlarnvs hastata (6-7 mm) x Cllnocardlnm nuttalln x Cr.elrtoluhodes typicus x Eupentacta quinquesemita x x Evasterias troschelli x Gobiesox maeandricus x x Haliotis kamtschatkana (11.1 mm) x Hemigrapsus nudus x x Hemigrapsus oregonensis x x Henricia leviuscula x
Hexagrammos sp.
The study of the lateral line of
Hexagrammos stelleri by Wonsetter & Webb (1997) showed that the development of scales along a lateral-line canal is not sequential, and they distinguished six stages of scale development (ibid., fig.
Anaesthetic effect of lidocaine hydrochloridesodium bicarbonate and MS-222 on the greenling (
Hexagrammos otakii).
In San Juan County, WA, voluntary marine protected areas for eight species of bottomfish (Sebastes spp., Scorpaenichthys marmoratus,
Hexagrammos decagrammus, Ophiodon elongatus) and southern resident killer whales (Orcinus orca) have been established through citizen action.
Species that were captured only by seine were Arctic cisco and threespine stickleback (Gasterasteus aculeatus), whereas species captured only by trawl were longhead dab (Limanda proboscidea), rainbow smelt (Osmerus mordax), whitespotted green ling (
Hexagrammos stelleri), and marbled eelpout (Lycodes raridens).
Instead, we examined gut contents of the common predatory kelp greenling (
Hexagrammos decagrammos (Pallas)), white-spotted greenling (H.