During the previous micronekton inter-calibration experiments, the following gears were tested: IKMT, FMT (= HUFT), Cobb trawl, MOCNESS-1 and MOCNESS-10, MOHT and a midwater otter trawl (OT) with Multi-sampler), and the superiority of MOHT over the other gears was shown. However, no direct comparison has been made between the MOHT and the IKMT. The latter gear has been used widely in previous (...

In this study, the part dynamics of the midwater trawl were modeled and simulated using mechanical equations and R language. A lumped mass method was used to model the dynamical behavior of a net in steady flow. And the implicit algorithm was developed to solve the stiff differential equations. The programming, simulation and visualization of the modeling were based on the R platform. The part ...

Previous studies of neustonic debris have been limited to surface sampling. Here we conducted two trawl surveys, one before and one shortly after a rain event, in which debris and zooplankton density were measured at three depths in Santa Monica Bay, California. Surface samples were collected with a manta trawl, mid-depth samples with a bongo net and bottom samples with an epibenthic sled, all ...

(5) How the establishment of the experimental population may contribute to recovery of the UC spring-run Chinook salmon ESU as a whole; (6) The extent to which the experimental population would be affected by current or future Federal, state, or private actions within or adjacent to the experimental population area; (7) Current programs within the experimental population area that protect fish ...