nicaragua has a canal that connects the atlantic and pacific ocean.
which country has a canal that connects the atlantic and pacific ocean?
nicaragua
‘róbalo’ or snook are world-renowned game fish of the family centropomidae and genus "centropomus" that are much sought after by fly fishing enthusiasts and sportfishing charters. six atlantic and six pacific ocean species are currently recognized as scientifically valid. all are known to inhabit central america and all are excellent gamefish. there is no evidence found of the individual species crossing from the atlantic to the pacific ocean or vice versa through the panama canal. all robalo or snook species are capable of inhabiting both fresh and saltwater and are known to seasonally occupy gatun lake, which forms a water bridge connecting the atlantic and pacific oceans as an integral part of the panama canal. of the twelve species only 4 are known to reach sizes in excess of 10 lbs. – two atlantic ocean species ("centropomus undecimalis" and "centropomus poeyi") and two pacific ocean species ("centropomus viridis" and "centropomus nigrescens"). the eight species of smaller robalo usually grow to less than 6 lbs. and can be readily distinguished by from the four larger species by their noticeably longer anal spine, anal fin configuration and body shape. the four large species are immediately recognizable by their more streamlined appearance given by the longer narrower body shape. many individual species of robalo bear a close resemblance to one another although they may be from the same or different oceans so identification is best left up to experts. the two atlantic ocean large robalo species ("centropomus undecimalis" and "centropomus poeyi") are virtually identical in appearance. they can usually only be distinguished by the number of gill rakers each possesses. the robalo or common snook ("centropomus undecimalis") commonly has eleven to thirteen non-rudimentary gill rakers and the mexican snook ("centropomus poeyi") is most often found to possess fifteen to eighteen non-rudimentary gill rakers. the pacific ocean “robalo ñato” or white snook ("centropomus viridis") is also a dead ringer for the common snook ("centropomus undecimalis"). the distinguishing feature is also the non-rudimentary gill raker count with thirteen to fifteen for the white snook ("centropomus viridis"). they act, breed, grow and fight virtually the same. curiously, laboratory reared specimens of the common snook ("centropomus undecimalis") showed meristic variations in vertebrae, fin ray and gill raker numbers not observed in specimens from the wild. these variations are suspected to be due to diet and growth rates. large robalo caught in lake gatun invariably cause a wealth of confusion. the igfa requires verification of the species by a designated authority for world record claims. the two pacific ocean species of large robalo ("centropomus viridis" and "centropomus nigrescens") are somewhat easier to distinguish.
centropomus
globally, approximately 450,500 metric tonnes of bigeye tuna were caught by commercial vessels in 2012. commercial fisheries for bigeye tuna are regionally managed within the pacific ocean by the western and central pacific fisheries commission (wcpfc) and the inter-american tropical tuna commission (iattc). in the indian ocean catches are managed by the indian ocean tuna commission (iotc) and in the atlantic ocean by the international commission for the conservation of atlantic tunas (iccat). regular stock assessments are carried out for bigeye tuna by each of the regional fisheries management organisations with bigeye tuna currently regarded as overfished in the western and central pacific ocean and eastern pacific ocean, close to or being overfished in the atlantic ocean and not overfished in the indian ocean. the majority of commercial catches across the pacific ocean is by purse seine fleets, while catches are dominated by longline fleets in the indian and atlantic oceans. various conservation measures have been introduced by the regional fisheries management organisations which apply to particular sized vessels and fleets and include measures such as spatial and temporal closures, trip duration limits, observer requirements and limits on catches
bigeye tuna