{"id":251,"date":"2012-04-23T06:57:18","date_gmt":"2012-04-23T06:57:18","guid":{"rendered":"http:\/\/blogs.oregonstate.edu\/marquesas\/?p=251"},"modified":"2012-05-01T04:47:30","modified_gmt":"2012-05-01T04:47:30","slug":"day-22-jour-22-21-april-2012","status":"publish","type":"post","link":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/2012\/04\/23\/day-22-jour-22-21-april-2012\/","title":{"rendered":"Day 22 (Jour 22) 21 April 2012 Nuku Hiva"},"content":{"rendered":"

\"\"<\/a>Once again weather conditions were less than optimal with high winds and a large ocean swell, but still we were able to survey the inshore waters of the south shore and west coast, as well as some of the offshore waters of the west coast.\u00a0 Almost immediately after we came out of Taiohae Bay (where our boat is docked) we encountered a school of melon-headed whales. They were traveling eastward along the south shore in very rough ocean conditions, but we managed to collect some biopsy samples and take photo-IDs.\u00a0\u00a0 Shortly after we left them and continued our transect line westward, we encountered another group of melon-headed whales, which was also traveling eastward as the others were.\u00a0 This second group was most likely a continuation of the first school we had encountered. \u00a0\u00a0After leaving these last melon-headed whales we encountered a small group of spotted dolphins and three schools of spinner dolphins, all of which were also traveling eastward against the wind and swell, but we succeeded in collecting a few biopsies and photo-IDs. \u00a0\u00a0On Nuku Hiva\u2019s west coast (the leeward side of the island) we worked in nearly ideal, calm conditions, but we found just one school of spinner dolphins along the entire coast\u2019s inshore waters.\u00a0 We then conducted some offshore transects, passing by two Fish Aggregating Devices (FADs).\u00a0 In the Society Islands we\u2019ve sometimes found offshore dolphin species such as rough-toothed dolphins near FADs. However, here in the Marquesas we have not found any dolphins at any FADs, and neither have the fishermen we\u2019ve interviewed. This could be because the FADs in the Marquesas are all relatively new (on Nuku Hiva they have only been present since the beginning of 2012) and are not yet established as a suitable habitat where fish may aggregate. Therefore, dolphins might not be attracted to these devices. Another reason why we have not encountered rough-toothed dolphins near FADs (or anywhere else we\u2019ve surveyed) in Marquesan waters could be that this species is simply not abundant here.\"\"<\/a><\/p>\n

Une fois encore, les conditions en mer \u00e9taient loin d\u2019\u00eatre optimum avec des vents assez fort et de la houle, mais nous avons tout de m\u00eame pu couvrir la c\u00f4te Sud ainsi que la c\u00f4te Ouest. En sortant de la baie de Taiohae, nous avons rencontr\u00e9 un groupe de p\u00e9ponoc\u00e9phales. Ils se d\u00e9pla\u00e7aient en direction de l\u2019Est dans une mer bien form\u00e9e mais nous avons r\u00e9ussi \u00e0 prendre plusieurs \u00e9chantillons ainsi que des photos. Apr\u00e8s les avoir quitt\u00e9, et alors que nous nous dirigions vers l\u2019Ouest, nous avons trouv\u00e9 un petit groupe de dauphins tachet\u00e9s et trois groupes de dauphins \u00e0 long bec. Tous se dirigeaient vers l\u2019Est, contre le vent et les vagues. Quelques biopsies et photos ont tout de m\u00eame pu \u00eatre collect\u00e9es. Sur la c\u00f4te Ouest de Nuku Hiva (sous le vent de l\u2019\u00eele), nous avons trouv\u00e9 des conditions de mer quasiment id\u00e9ales mais malheureusement nous avons seulement rencontr\u00e9 un groupe de dauphins \u00e0 long bec peu coop\u00e9ratif sur cette zone. Ensuite, nous avons effectu\u00e9 quelques transects au large, passant notamment pr\u00e8s de deux DCP (Dispositif de Concentration de Poissons). Dans les \u00eeles de la Soci\u00e9t\u00e9, nous avons parfois trouv\u00e9 des esp\u00e8ces de dauphins p\u00e9lagiques, tel que le dauphin \u00e0 bec \u00e9troit, pr\u00e8s de DCP mais ici aux Marquises, \u00e7a n\u2019a pas \u00e9t\u00e9 le cas. Plusieurs p\u00eacheurs de ces \u00eeles auxquels nous avons pos\u00e9 la question nous ont \u00e9galement indiqu\u00e9 ne pas voir de dauphins \u00e0 proximit\u00e9 des dispositifs. On ignore si les dauphins aux Marquises ne sont pas attir\u00e9s par les DCP ou si les dispositifs sont encore trop r\u00e9cents pour avoir \u00ab\u00a0fait effet\u00a0\u00bb sur ces esp\u00e8ces.\u00a0 Mais l\u2019absence de rencontre avec les dauphins \u00e0 bec \u00e9troit depuis le d\u00e9but de l\u2019exp\u00e9dition s\u2019explique peut \u00eatre tout simplement par une plus faible concentration de l\u2019esp\u00e8ce dans cette r\u00e9gion. <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Once again weather conditions were less than optimal with high winds and a large ocean swell, but still we were able to survey the inshore waters of the south shore and west coast, as well as some of the offshore … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":3761,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-251","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/posts\/251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/users\/3761"}],"replies":[{"embeddable":true,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/comments?post=251"}],"version-history":[{"count":2,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/posts\/251\/revisions"}],"predecessor-version":[{"id":301,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/posts\/251\/revisions\/301"}],"wp:attachment":[{"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/media?parent=251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/categories?post=251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dev.blogs.oregonstate.edu\/marquesas\/wp-json\/wp\/v2\/tags?post=251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}